Simple Encryption/Decryption

• Crypt()

  • Syntax: _Crypt(str, k, inv)

  • Purpose: Performs basic encryption and decryption using a provided key.

  • Parameters:

    • str: The string to encrypt or decrypt.

    • k: An array containing the encryption key values.

    • inv: (Optional) True for decryption, false for encryption (default).

Base64 Encoding/Decoding

• Dec_base64()

  • Syntax: _Dec_base64(binary_data)

  • Purpose: Decodes Base64 encoded text or binary data back to its original form.

• Enc_base64()

  • Syntax: _Enc_base64(binary_data)

  • Purpose: Encodes plain text or binary data into the Base64 format. This is often used for data portability and safe transmission.

Mapping-Based Encryption/Decryption

• Decrypt()

  • Syntax: _Decrypt(value_to_decrypt, encrypted_values, decrypted_values)

  • Purpose: Decrypts a value by mapping it from a list of encrypted values to a corresponding list of decrypted values.

• Multi_Decrypt()

  • Syntax: _Multi_Decrypt(value_to_decrypt, encrypted_values, decrypted_values)

  • Purpose: Similar to Decrypt, but replaces all matching encrypted values within the input string.

Hashing

• Sha1()

  • Syntax: _Sha1(string)

  • Purpose: Applies the SHA1 cryptographic hash function to a string, generating a secure fingerprint of the input data.

• Sha256()

  • Syntax: _Sha256(string)

  • Purpose: Applies the SHA256 hash function (even more secure than SHA1).

Advanced Encryption (dDen, dEnc)

• dDen()

  • Syntax: _dDen(str, key1, key2)

  • Purpose: Decrypts data using a more complex method, requiring two different keys.

• dEnc()

  • Syntax: _dEnc(str, key1, key2)

  • Purpose: The corresponding encryption function for dDen.

Key Points

• Security Levels: The Crypt function provides basic obfuscation. For more robust security, consider Sha1, Sha256, or the dDen/dEnc methods.

• Base64: This is primarily for encoding data into a transmittable format, not strong encryption.

• Key Management: Protecting your encryption keys is crucial for maintaining the security of your encrypted data!

Example: Combining Techniques

-- Securely storing a password
originalPassword = "MySecret123"
hashedPassword = _Sha256(originalPassword) 
storedData = _dEnc(hashedPassword, "key1", "key2") 

-- Later, when verifying login
enteredPassword = "...."  -- Get this from user input
hashedInput = _Sha256(enteredPassword)
decryptedHash = _dDen(storedData, "key1", "key2")

if hashedInput == decryptedHash then
   -- Login successful
end