更新 chaoscrypt.py

revert 删除 .gitignore

chaoscrypt.py

@@ -1,3 +1,7 @@
+"""
+A multi-layer encryption system with key management, substitution ciphers,
+XOR operations, and dynamic key derivation.
+"""
 
 import base64
 import json
@@ -5,12 +9,23 @@ import os
 import time
 from datetime import datetime
 
+
 class EncryptionSystem:
+    """Main encryption engine with key-based transformation layers."""
+
     def __init__(self, key_file=None, key_password=None):
+        """
+        Initialize the encryption system with an optional key file.
+
+        Args:
+            key_file: Path to the encryption key file.
+            key_password: Password for decrypting the key file.
+        """
         self.key_file = key_file
         self.key_password = key_password
         self.keys_loaded = False
 
+        # Base64 special character mappings for safe transport
         self.special_encrypt = {
             '+': '.',
             '/': "'",
@@ -23,38 +38,46 @@ class EncryptionSystem:
 
         self.flip_pattern = None
 
+        # Try loading the key file if provided or find default
         if key_file:
             if os.path.exists(key_file):
                 if key_password is None:
-                    key_password = input(f"请输入密钥文件 {key_file} 的密码: ")
+                    key_password = input(f"Enter password for key file {key_file}: ")
                 self._load_keys(key_file, key_password)
                 self.keys_loaded = True
             else:
-                print(f"⚠️ 密钥文件 {key_file} 不存在")
+                print(f"⚠️ Key file {key_file} not found")
                 self.keys_loaded = False
         else:
             default_key = "encryption.key"
             if os.path.exists(default_key):
                 self.key_file = default_key
                 if key_password is None:
-                    key_password = input(f"请输入密钥文件 {default_key} 的密码: ")
+                    key_password = input(f"Enter password for key file {default_key}: ")
                 self._load_keys(default_key, key_password)
                 self.keys_loaded = True
             else:
                 print("=" * 60)
-                print("首次启动，请先生成密钥文件")
+                print("First launch detected. Please generate a key file first.")
                 print("=" * 60)
                 self.keys_loaded = False
 
+    # ----------------------------------------------------------------------
+    # Key generation utilities
+    # ----------------------------------------------------------------------
+
     def _generate_random_alphabet(self, lowercase=False):
+        """Generate a shuffled alphabet string."""
         chars = list("abcdefghijklmnopqrstuvwxyz" if lowercase else "ABCDEFGHIJKLMNOPQRSTUVWXYZ")
         n = len(chars)
+        # Fisher-Yates shuffle using secure random bytes
         for i in range(n - 1, 0, -1):
             j = int.from_bytes(os.urandom(1), 'big') % (i + 1)
             chars[i], chars[j] = chars[j], chars[i]
         return ''.join(chars)
 
     def _generate_random_digit_mapping(self):
+        """Create a random mapping for digits 0-9 to alphabet characters."""
         digits = list("0123456789")
         mapping_chars = list("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")
         n = len(mapping_chars)
@@ -67,72 +90,69 @@ class EncryptionSystem:
         return mapping
 
     def _generate_random_equal_mapping(self):
+        """Generate mapping for Base64 padding count (0-3)."""
         chars = list("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")
         n = len(chars)
         for i in range(n - 1, 0, -1):
             j = int.from_bytes(os.urandom(1), 'big') % (i + 1)
             chars[i], chars[j] = chars[j], chars[i]
-        mapping = {
+        return {
             '0': chars[0],
             '1': chars[1],
             '2': chars[2],
             '3': chars[3]
         }
-        return mapping
 
     def _generate_random_flip_pattern(self):
-        pattern = []
+        """Generate a 10-bit pattern for case-flipping."""
-        for _ in range(10):
+        return [int.from_bytes(os.urandom(1), 'big') % 2 for _ in range(10)]
-            bit = int.from_bytes(os.urandom(1), 'big') % 2
-            pattern.append(bit)
-        return pattern
 
     def _generate_long_key(self, length=4096):
+        """Generate a long hex key (4096 chars by default)."""
         chars = "0123456789abcdef"
-        result = []
+        return ''.join(chars[int.from_bytes(os.urandom(1), 'big') % 16] for _ in range(length))
-        for _ in range(length):
-            idx = int.from_bytes(os.urandom(1), 'big') % 16
-            result.append(chars[idx])
-        return ''.join(result)
 
     def _generate_short_key(self, length=512):
+        """Generate a short hex key (512 chars by default)."""
         chars = "0123456789abcdef"
-        result = []
+        return ''.join(chars[int.from_bytes(os.urandom(1), 'big') % 16] for _ in range(length))
-        for _ in range(length):
+
-            idx = int.from_bytes(os.urandom(1), 'big') % 16
+    # ----------------------------------------------------------------------
-            result.append(chars[idx])
+    # Key obfuscation and persistence
-        return ''.join(result)
+    # ----------------------------------------------------------------------
 
     def _obfuscate_keys(self, keys_data):
+        """Obfuscate key data using base64 + reversal + Caesar shift."""
         json_str = json.dumps(keys_data)
         b64 = base64.b64encode(json_str.encode()).decode()
         reversed_b64 = b64[::-1]
-        shifted = ''.join([chr((ord(c) + 1) % 128) for c in reversed_b64])
+        shifted = ''.join(chr((ord(c) + 1) % 128) for c in reversed_b64)
-        final = base64.b64encode(shifted.encode()).decode()
+        return base64.b64encode(shifted.encode()).decode()
-        return final
 
     def _deobfuscate_keys(self, obfuscated_data):
+        """Reverse the obfuscation to recover original key data."""
         try:
             shifted = base64.b64decode(obfuscated_data.encode()).decode()
-            reversed_b64 = ''.join([chr((ord(c) - 1) % 128) for c in shifted])
+            reversed_b64 = ''.join(chr((ord(c) - 1) % 128) for c in shifted)
             b64 = reversed_b64[::-1]
             json_str = base64.b64decode(b64.encode()).decode()
             return json.loads(json_str)
-        except Exception:
+        except Exception as exc:
-            raise Exception("密钥文件损坏")
+            raise Exception("Key file corrupted") from exc
 
     def _xor_encrypt_data(self, data, password):
-        result = []
+        """XOR encrypt data with a password, returning hex string."""
         key_len = len(password)
-        for i, char in enumerate(data):
+        return ''.join(
-            xor_result = ord(char) ^ ord(password[i % key_len])
+            f"{ord(char) ^ ord(password[i % key_len]):02x}"
-            result.append(f"{xor_result:02x}")
+            for i, char in enumerate(data)
-        return ''.join(result)
+        )
 
     def _xor_decrypt_data(self, hex_data, password):
+        """XOR decrypt hex data with a password."""
         try:
-            result = []
             key_len = len(password)
+            result = []
             for i in range(0, len(hex_data), 2):
                 if i + 1 < len(hex_data):
                     hex_byte = hex_data[i:i+2]
@@ -143,17 +163,28 @@ class EncryptionSystem:
             return None
 
     def generate_keys(self, save_path=None, key_password=None):
+        """
+        Generate a fresh set of encryption keys and save to a key file.
+
+        Args:
+            save_path: Path to save the key file (default: encryption.key).
+            key_password: Password to protect the key file.
+
+        Returns:
+            The password used, or None if generation failed.
+        """
         if key_password is None:
-            key_password = input("请设置密钥文件密码: ")
+            key_password = input("Set key file password: ")
-            confirm = input("请再次输入密码确认: ")
+            confirm = input("Confirm password: ")
             if key_password != confirm:
-                print("❌ 密码不匹配")
+                print("❌ Passwords do not match")
                 return None
 
         print("=" * 60)
-        print("正在生成随机密钥...")
+        print("Generating random keys...")
         print("=" * 60)
 
+        # Generate all key components
         self.upper_mapping = self._generate_random_alphabet(lowercase=False)
         self.lower_mapping = self._generate_random_alphabet(lowercase=True)
         self.digit_mapping = self._generate_random_digit_mapping()
@@ -162,9 +193,11 @@ class EncryptionSystem:
         self.long_key = self._generate_long_key(4096)
         self.short_key = self._generate_short_key(512)
 
+        # Build reverse mappings
         self.digit_reverse = {v: k for k, v in self.digit_mapping.items()}
         self.equal_reverse = {v: k for k, v in self.equal_mapping.items()}
 
+        # Bundle keys into a dictionary
         keys_data = {
             'upper_mapping': self.upper_mapping,
             'lower_mapping': self.lower_mapping,
@@ -176,6 +209,7 @@ class EncryptionSystem:
             'generated_at': datetime.now().isoformat()
         }
 
+        # Obfuscate and encrypt the key data
         obfuscated = self._obfuscate_keys(keys_data)
         encrypted = self._xor_encrypt_data(obfuscated, key_password)
 
@@ -190,12 +224,17 @@ class EncryptionSystem:
         self.keys_loaded = True
         self._build_maps()
 
-        print(f"✅ 密钥已生成并保存到: {save_path}")
+        print(f"✅ Keys generated and saved to: {save_path}")
         print("=" * 60)
 
         return save_path
 
+    # ----------------------------------------------------------------------
+    # Internal helpers
+    # ----------------------------------------------------------------------
+
     def _build_maps(self):
+        """Build encryption and decryption maps from shuffled alphabets."""
         self.upper_original = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
         self.lower_original = "abcdefghijklmnopqrstuvwxyz"
 
@@ -208,13 +247,14 @@ class EncryptionSystem:
             self.decrypt_map[self.lower_mapping[i]] = self.lower_original[i]
 
     def _load_keys(self, key_file, key_password):
+        """Load and decrypt keys from a key file."""
         try:
             with open(key_file, 'r') as f:
                 encrypted_data = f.read()
 
             decrypted = self._xor_decrypt_data(encrypted_data, key_password)
             if decrypted is None:
-                print("❌ 密码错误")
+                print("❌ Incorrect password")
                 self.keys_loaded = False
                 return
 
@@ -235,17 +275,18 @@ class EncryptionSystem:
             self._build_maps()
 
             self.keys_loaded = True
-            print(f"✅ 密钥已从 {key_file} 加载")
+            print(f"✅ Keys loaded from {key_file}")
 
         except Exception:
-            print("❌ 加载失败")
+            print("❌ Loading failed")
             self.keys_loaded = False
 
     def _ensure_printable(self, text):
+        """Force all characters into printable ASCII range (32-126)."""
         result = []
         for c in text:
             val = ord(c)
-            if val == 124:
+            if val == 124:  # '|' is used as a separator, keep it
                 result.append('|')
             elif val < 32 or val > 126:
                 val = val % 95 + 32
@@ -254,10 +295,25 @@ class EncryptionSystem:
                 result.append(c)
         return ''.join(result)
 
-    def _mix_keys(self, user_password, target_length):
+    # ----------------------------------------------------------------------
-        if not self.keys_loaded:
+    # Key derivation
-            raise Exception("密钥未加载")
+    # ----------------------------------------------------------------------
 
+    def _mix_keys(self, user_password, target_length):
+        """
+        Mix the user password with the short key using bit operations and swaps.
+
+        Args:
+            user_password: User-provided password.
+            target_length: Desired output length.
+
+        Returns:
+            A mixed printable string.
+        """
+        if not self.keys_loaded:
+            raise Exception("Keys not loaded")
+
+        # Interleave user password and short key
         mixed = []
         max_len = max(len(user_password), len(self.short_key))
         for i in range(max_len):
@@ -266,6 +322,7 @@ class EncryptionSystem:
             if i < len(self.short_key):
                 mixed.append(ord(self.short_key[i]))
 
+        # Apply bit transformations
         for i in range(len(mixed)):
             if i % 3 == 0:
                 mixed[i] = (mixed[i] << 1) & 0xFF
@@ -274,12 +331,14 @@ class EncryptionSystem:
             else:
                 mixed[i] = mixed[i] ^ 0x5A
 
+        # Swap pairs
         for i in range(0, len(mixed) - 3, 4):
             mixed[i], mixed[i+3] = mixed[i+3], mixed[i]
             mixed[i+1], mixed[i+2] = mixed[i+2], mixed[i+1]
 
         mixed.reverse()
 
+        # Convert to printable characters
         result = []
         for x in mixed:
             if x < 32 or x > 126:
@@ -288,6 +347,7 @@ class EncryptionSystem:
 
         result_str = ''.join(result)
 
+        # Extend if needed by repeating with variations
         if len(result_str) < target_length:
             base_key = result_str
             final_key = base_key
@@ -297,10 +357,10 @@ class EncryptionSystem:
                     next_chunk = base_key[::-1]
                 elif iteration % 3 == 1:
                     next_chunk = base_key[::-1]
-                    next_chunk = ''.join([chr((ord(c) + iteration) % 95 + 32) for c in next_chunk])
+                    next_chunk = ''.join(chr((ord(c) + iteration) % 95 + 32) for c in next_chunk)
                 else:
                     next_chunk = base_key[::-1]
-                    next_chunk = ''.join([chr((ord(c) ^ iteration) % 95 + 32) for c in next_chunk])
+                    next_chunk = ''.join(chr((ord(c) ^ iteration) % 95 + 32) for c in next_chunk)
                 final_key += next_chunk
                 iteration += 1
             result_str = final_key[:target_length]
@@ -308,11 +368,18 @@ class EncryptionSystem:
         return self._ensure_printable(result_str)
 
     def _derive_final_key(self, user_password, text_length):
+        """
+        Derive a final encryption key from the user password and short key.
+
+        The process includes mixing, hex conversion, reversal, and extension.
+        """
         mixed_key = self._mix_keys(user_password, text_length * 2)
 
-        hex_key = ''.join([f"{ord(c):02x}" for c in mixed_key])
+        # Convert to hex and reverse
+        hex_key = ''.join(f"{ord(c):02x}" for c in mixed_key)
         reversed_hex = hex_key[::-1]
 
+        # Convert back to printable characters
         final_key = []
         for i in range(0, len(reversed_hex), 2):
             if i + 1 < len(reversed_hex):
@@ -327,6 +394,7 @@ class EncryptionSystem:
 
         final_key_str = ''.join(final_key)
 
+        # Extend if needed
         if len(final_key_str) < text_length:
             base_key = final_key_str
             iteration = 0
@@ -335,19 +403,22 @@ class EncryptionSystem:
                     next_chunk = base_key[::-1]
                 elif iteration % 3 == 1:
                     next_chunk = base_key[::-1]
-                    next_chunk = ''.join([chr((ord(c) + iteration) % 95 + 32) for c in next_chunk])
+                    next_chunk = ''.join(chr((ord(c) + iteration) % 95 + 32) for c in next_chunk)
                 else:
                     next_chunk = base_key[::-1]
-                    next_chunk = ''.join([chr((ord(c) ^ iteration) % 95 + 32) for c in next_chunk])
+                    next_chunk = ''.join(chr((ord(c) ^ iteration) % 95 + 32) for c in next_chunk)
                 final_key_str += next_chunk
                 iteration += 1
 
         final_key_str = final_key_str[:text_length]
-        final_key_str = self._ensure_printable(final_key_str)
+        return self._ensure_printable(final_key_str)
 
-        return final_key_str
+    # ----------------------------------------------------------------------
+    # Core encryption operations
+    # ----------------------------------------------------------------------
 
     def _apply_flip(self, text):
+        """Apply case-flipping based on the flip pattern."""
         if self.flip_pattern is None:
             return text
 
@@ -361,15 +432,16 @@ class EncryptionSystem:
         return ''.join(result)
 
     def _xor_encrypt_with_final_key(self, text, user_password):
+        """XOR encrypt with the derived final key, returning hex."""
         final_key = self._derive_final_key(user_password, len(text))
         key_len = len(final_key)
-        result = []
+        return ''.join(
-        for i, char in enumerate(text):
+            f"{ord(char) ^ ord(final_key[i % key_len]):02x}"
-            xor_result = ord(char) ^ ord(final_key[i % key_len])
+            for i, char in enumerate(text)
-            result.append(f"{xor_result:02x}")
+        )
-        return ''.join(result)
 
     def _xor_decrypt_with_final_key(self, hex_text, user_password):
+        """XOR decrypt with the derived final key."""
         try:
             text_length = len(hex_text) // 2
             final_key = self._derive_final_key(user_password, text_length)
@@ -390,47 +462,35 @@ class EncryptionSystem:
             return None
 
     def _substitute_letters(self, text, mapping):
-        result = []
+        """Apply a substitution map to letters."""
-        for char in text:
+        return ''.join(mapping.get(char, char) for char in text)
-            if char in mapping:
-                result.append(mapping[char])
-            else:
-                result.append(char)
-        return ''.join(result)
 
     def _encode_digit(self, num_str):
-        result = []
+        """Encode a digit string using the digit mapping."""
-        for char in num_str:
+        return ''.join(self.digit_mapping.get(char, char) for char in num_str)
-            if char in self.digit_mapping:
-                result.append(self.digit_mapping[char])
-            else:
-                result.append(char)
-        return ''.join(result)
 
     def _decode_digit(self, encoded_str):
-        result = []
+        """Decode a digit string using the reverse digit mapping."""
-        for char in encoded_str:
+        return ''.join(self.digit_reverse.get(char, char) for char in encoded_str)
-            if char in self.digit_reverse:
-                result.append(self.digit_reverse[char])
-            else:
-                result.append(char)
-        return ''.join(result)
 
     def _get_dynamic_key(self, text_length):
+        """Generate a dynamic key from the long key, repeated as needed."""
         key = self.long_key
-        while len(key) < text_length:
+        if len(key) < text_length:
-            key += self.long_key
+            repeats = (text_length // len(key)) + 1
+            key = (key * repeats)[:text_length]
         return key[:text_length]
 
     def _xor_encrypt_with_key(self, text, key):
+        """XOR encrypt with a fixed key, returning hex."""
         key_len = len(key)
-        result = []
+        return ''.join(
-        for i, char in enumerate(text):
+            f"{ord(char) ^ ord(key[i % key_len]):02x}"
-            xor_result = ord(char) ^ ord(key[i % key_len])
+            for i, char in enumerate(text)
-            result.append(f"{xor_result:02x}")
+        )
-        return ''.join(result)
 
     def _xor_decrypt_with_key(self, hex_text, key):
+        """XOR decrypt with a fixed key."""
         try:
             key_len = len(key)
             result = []
@@ -448,10 +508,28 @@ class EncryptionSystem:
         except Exception:
             return None
 
-    def encrypt(self, plaintext, user_password):
+    # ----------------------------------------------------------------------
-        if not self.keys_loaded:
+    # Public API
-            return "❌ 错误：密钥未加载"
+    # ----------------------------------------------------------------------
 
+    def encrypt(self, plaintext, user_password):
+        """
+        Encrypt plaintext with the given password.
+
+        Workflow:
+        1. Base64 encode the plaintext.
+        2. Apply letter substitution and case-flipping.
+        3. Reverse the string and append padding count.
+        4. XOR encrypt with dynamic key (long key).
+        5. XOR encrypt with derived final key (user password + short key).
+
+        Returns:
+            Encrypted ciphertext as a hex string.
+        """
+        if not self.keys_loaded:
+            return "❌ Error: Keys not loaded"
+
+        # Step 1: Base64 encode and handle special chars
         b64 = base64.b64encode(plaintext.encode('utf-8')).decode('utf-8')
         equal_count = b64.count('=')
 
@@ -460,33 +538,44 @@ class EncryptionSystem:
             processed = processed.replace(old, new)
         processed = processed.rstrip('=')
 
+        # Step 2: Letter substitution + flip + reverse
         sub = self._substitute_letters(processed, self.encrypt_map)
         flipped = self._apply_flip(sub)
         reversed_text = flipped[::-1]
 
+        # Step 3: Append padding count
         equal_char = self.equal_mapping[str(equal_count)]
         with_equal = f"{reversed_text}|{equal_char}"
 
+        # Step 4: Dynamic key (long key) encryption
         key_length_str = str(len(with_equal))
         key_length_encoded = self._encode_digit(key_length_str)
-        
         dynamic_key = self._get_dynamic_key(len(with_equal))
         encrypted_by_dynamic = self._xor_encrypt_with_key(with_equal, dynamic_key)
 
+        # Step 5: Final encryption with derived key
         combined = f"{encrypted_by_dynamic}|{key_length_encoded}"
         final_encrypted = self._xor_encrypt_with_final_key(combined, user_password)
 
         return final_encrypted
 
     def decrypt(self, ciphertext, user_password):
+        """
+        Decrypt ciphertext with the given password.
+
+        Returns:
+            The original plaintext, or an error message on failure.
+        """
         if not self.keys_loaded:
-            return "❌ 解密失败"
+            return "❌ Decryption failed"
 
         try:
+            # Step 1: Decrypt with derived final key
             combined = self._xor_decrypt_with_final_key(ciphertext, user_password)
             if combined is None:
-                return "❌ 解密失败"
+                return "❌ Decryption failed"
 
+            # Step 2: Extract hex data and length indicator
             if '|' in combined:
                 parts = combined.split('|')
                 if len(parts) >= 2:
@@ -499,6 +588,7 @@ class EncryptionSystem:
                 hex_data = combined
                 key_length_encoded = 'g'
 
+            # Step 3: Decode length and get dynamic key
             key_length_str = self._decode_digit(key_length_encoded)
             try:
                 key_length = int(key_length_str)
@@ -506,10 +596,13 @@ class EncryptionSystem:
                 key_length = 16
 
             dynamic_key = self._get_dynamic_key(key_length)
+
+            # Step 4: Decrypt with dynamic key
             xor_decrypted = self._xor_decrypt_with_key(hex_data, dynamic_key)
             if xor_decrypted is None:
-                return "❌ 解密失败"
+                return "❌ Decryption failed"
 
+            # Step 5: Extract main data and padding count
             if '|' in xor_decrypted:
                 main_part, equal_char = xor_decrypted.split('|')
                 equal_count = int(self.equal_reverse.get(equal_char, '0'))
@@ -517,192 +610,211 @@ class EncryptionSystem:
                 main_part = xor_decrypted
                 equal_count = 0
 
+            # Step 6: Reverse, flip, substitute
             reversed_text = main_part[::-1]
             flipped = self._apply_flip(reversed_text)
             sub = self._substitute_letters(flipped, self.decrypt_map)
 
+            # Step 7: Restore Base64 special chars and padding
             for old, new in self.special_decrypt.items():
                 sub = sub.replace(old, new)
 
             b64_with_equal = sub + '=' * equal_count
 
             if len(b64_with_equal) % 4 != 0:
-                return "❌ 解密失败"
+                return "❌ Decryption failed"
 
+            # Step 8: Base64 decode
             decoded = base64.b64decode(b64_with_equal.encode('utf-8')).decode('utf-8')
             return decoded
 
         except Exception:
-            return "❌ 解密失败"
+            return "❌ Decryption failed"
 
     def print_keys(self):
+        """Display information about the currently loaded keys."""
         if not self.keys_loaded:
-            print("❌ 未加载密钥")
+            print("❌ Keys not loaded")
             return
 
         print("=" * 60)
-        print("密钥信息")
+        print("Key Information")
         print("=" * 60)
-        print(f"密钥文件: {self.key_file}")
+        print(f"Key file: {self.key_file}")
-        print(f"大写映射表: {self.upper_mapping}")
+        print(f"Uppercase mapping: {self.upper_mapping}")
-        print(f"小写映射表: {self.lower_mapping}")
+        print(f"Lowercase mapping: {self.lower_mapping}")
-        print(f"翻转模式: {self.flip_pattern}")
+        print(f"Flip pattern: {self.flip_pattern}")
-        print(f"长密钥长度: {len(self.long_key)} 位")
+        print(f"Long key length: {len(self.long_key)} bits")
-        print(f"短密钥长度: {len(self.short_key)} 位")
+        print(f"Short key length: {len(self.short_key)} bits")
         print("=" * 60)
 
 
+# ----------------------------------------------------------------------
+# CLI Entry Point
+# ----------------------------------------------------------------------
+
 def main():
+    """Command-line interface for the encryption system."""
     print("=" * 60)
-    print("欢迎使用加密系统")
+    print("Welcome to the Encryption System")
     print("=" * 60)
 
     crypto = None
     key_password = None
 
+    # Try loading default key file
     if os.path.exists("encryption.key"):
-        key_password = input("请输入默认密钥文件 (encryption.key) 的密码: ")
+        key_password = input("Enter password for default key file (encryption.key): ")
         crypto = EncryptionSystem("encryption.key", key_password)
         if not crypto.keys_loaded:
-            print("❌ 加载失败")
+            print("❌ Loading failed")
             crypto = None
     else:
-        print("\n未找到默认密钥文件，请先生成")
+        print("\nDefault key file not found. Please generate one first.")
-        choice = input("是否生成默认密钥文件？(y/n): ").strip().lower()
+        choice = input("Generate default key file? (y/n): ").strip().lower()
         if choice == 'y':
             crypto = EncryptionSystem()
-            key_password = crypto.generate_keys("encryption.key")
+            result = crypto.generate_keys("encryption.key")
-            if key_password is None:
+            if result is None:
-                print("❌ 生成失败")
+                print("❌ Generation failed")
                 crypto = None
         else:
-            print("⚠️ 请使用模式4或5指定密钥文件，或模式6生成新密钥")
+            print("⚠️ Use options 4, 5, or 6 to manage key files manually.")
 
+    # Main interaction loop
     while True:
-        print("\n请选择操作:")
+        print("\nSelect an option:")
-        print("1. 使用默认密钥加密")
+        print("1. Encrypt with default key")
-        print("2. 使用默认密钥解密")
+        print("2. Decrypt with default key")
-        print("3. 生成新密钥（覆盖默认）")
+        print("3. Generate new key (overwrite default)")
-        print("4. 使用指定密钥文件加密")
+        print("4. Encrypt with custom key file")
-        print("5. 使用指定密钥文件解密")
+        print("5. Decrypt with custom key file")
-        print("6. 生成密钥并保存到当前文件夹")
+        print("6. Generate key and save to current folder")
-        print("7. 查看当前密钥信息")
+        print("7. View current key info")
-        print("8. 退出")
+        print("8. Exit")
 
-        choice = input("\n请选择操作 (1-8): ").strip()
+        choice = input("\nEnter choice (1-8): ").strip()
 
         if choice == '1':
+            # Encrypt with default key
             if crypto is None or not crypto.keys_loaded:
                 if os.path.exists("encryption.key"):
                     if key_password is None:
-                        key_password = input("请输入默认密钥文件密码: ")
+                        key_password = input("Enter default key file password: ")
                     crypto = EncryptionSystem("encryption.key", key_password)
                     if not crypto.keys_loaded:
-                        print("❌ 加载失败")
+                        print("❌ Loading failed")
                         continue
                 else:
-                    print("❌ 密钥文件不存在")
+                    print("❌ Key file not found")
                     continue
 
-            password = input("请输入加密密码: ")
+            password = input("Enter encryption password: ")
-            text = input("请输入要加密的文本: ")
+            text = input("Enter text to encrypt: ")
             if text and password:
                 encrypted = crypto.encrypt(text, password)
-                print(f"\n✅ 加密结果: {encrypted}")
+                print(f"\n✅ Encrypted result: {encrypted}")
 
         elif choice == '2':
+            # Decrypt with default key
             if crypto is None or not crypto.keys_loaded:
                 if os.path.exists("encryption.key"):
                     if key_password is None:
-                        key_password = input("请输入默认密钥文件密码: ")
+                        key_password = input("Enter default key file password: ")
                     crypto = EncryptionSystem("encryption.key", key_password)
                     if not crypto.keys_loaded:
-                        print("❌ 加载失败")
+                        print("❌ Loading failed")
                         continue
                 else:
-                    print("❌ 密钥文件不存在")
+                    print("❌ Key file not found")
                     continue
 
-            password = input("请输入加密密码: ")
+            password = input("Enter encryption password: ")
-            text = input("请输入要解密的密文: ")
+            text = input("Enter ciphertext to decrypt: ")
             if text and password:
                 decrypted = crypto.decrypt(text, password)
-                print(f"\n✅ 解密结果: {decrypted}")
+                print(f"\n✅ Decrypted result: {decrypted}")
 
         elif choice == '3':
+            # Generate and overwrite default key
             crypto = EncryptionSystem()
-            key_password = crypto.generate_keys("encryption.key")
+            result = crypto.generate_keys("encryption.key")
-            if key_password is None:
+            if result is None:
-                print("❌ 生成失败")
+                print("❌ Generation failed")
             else:
-                print("✅ 默认密钥已更新")
+                print("✅ Default key updated")
 
         elif choice == '4':
-            key_file = input("请输入密钥文件路径: ")
+            # Encrypt with custom key file
+            key_file = input("Enter key file path: ")
             if not os.path.exists(key_file):
-                print(f"❌ 文件不存在")
+                print(f"❌ File not found: {key_file}")
                 continue
 
-            kp = input(f"请输入密钥文件密码: ")
+            kp = input("Enter key file password: ")
             crypto = EncryptionSystem(key_file, kp)
             if not crypto.keys_loaded:
-                print("❌ 加载失败")
+                print("❌ Loading failed")
                 continue
 
-            password = input("请输入加密密码: ")
+            password = input("Enter encryption password: ")
-            text = input("请输入要加密的文本: ")
+            text = input("Enter text to encrypt: ")
             if text and password:
                 encrypted = crypto.encrypt(text, password)
-                print(f"\n✅ 加密结果: {encrypted}")
+                print(f"\n✅ Encrypted result: {encrypted}")
 
         elif choice == '5':
-            key_file = input("请输入密钥文件路径: ")
+            # Decrypt with custom key file
+            key_file = input("Enter key file path: ")
             if not os.path.exists(key_file):
-                print(f"❌ 文件不存在")
+                print(f"❌ File not found: {key_file}")
                 continue
 
-            kp = input(f"请输入密钥文件密码: ")
+            kp = input("Enter key file password: ")
             crypto = EncryptionSystem(key_file, kp)
             if not crypto.keys_loaded:
-                print("❌ 加载失败")
+                print("❌ Loading failed")
                 continue
 
-            password = input("请输入加密密码: ")
+            password = input("Enter encryption password: ")
-            text = input("请输入要解密的密文: ")
+            text = input("Enter ciphertext to decrypt: ")
             if text and password:
                 decrypted = crypto.decrypt(text, password)
-                print(f"\n✅ 解密结果: {decrypted}")
+                print(f"\n✅ Decrypted result: {decrypted}")
 
         elif choice == '6':
+            # Generate new key with timestamp
             timestamp = int(time.time())
             filename = f"key_{timestamp}.key"
             crypto = EncryptionSystem()
-            kp = crypto.generate_keys(filename)
+            result = crypto.generate_keys(filename)
-            if kp is None:
+            if result is None:
-                print("❌ 生成失败")
+                print("❌ Generation failed")
             else:
-                print(f"✅ 密钥已保存到: {filename}")
+                print(f"✅ Key saved to: {filename}")
 
         elif choice == '7':
+            # Show key info
             if crypto is None or not crypto.keys_loaded:
                 if os.path.exists("encryption.key"):
                     if key_password is None:
-                        key_password = input("请输入默认密钥文件密码: ")
+                        key_password = input("Enter default key file password: ")
                     crypto = EncryptionSystem("encryption.key", key_password)
                     if not crypto.keys_loaded:
-                        print("❌ 加载失败")
+                        print("❌ Loading failed")
                         continue
                 else:
-                    print("❌ 未加载密钥")
+                    print("❌ Keys not loaded")
                     continue
             crypto.print_keys()
 
         elif choice == '8':
-            print("感谢使用，再见!")
+            print("Goodbye!")
             break
 
         else:
-            print("❌ 无效选择")
+            print("❌ Invalid choice")
+
 
 if __name__ == "__main__":
     main()