ImageEn, unit imageenproc




procedure Encrypt(const Passkey: AnsiString; Algorithm: TIEEncryptionAlgorithm = ieeaTEA);
procedure Encrypt(Passkey: array of byte; Algorithm: TIEEncryptionAlgorithm = ieeaTEA);


Encrypts the current image (layer) using the Tiny Encryption Algorithm with a key of 128 bits:

Parameter Description
PassKey You can specify a string password, which will be hashed to a 128 bits key, or an array of bytes (a binary key of 16 bytes)
Algorithm Either ieeaTEA or ieeaTEA2. We recommend using ieeaTEA2 for better encryption

Warning: The image must be saved using a lossless format and in full rgb color spaces (no palette). If you use a lossy format such as JPEG, or a limited color format, such as GIF, you will not be able to decrypt the image.

- The image muse be decrypted using Decrypt
- There is no way to know whether an image is encrypted, unless you insert special tags into the meta-data yourself, such as PNG_TextKeys for PNG, or EXIF or IPTC for TIFF
- ieeaTEA2 should be used for stronger encryption (use ieeaTEA only for legacy compatibility)


ImageEnView1.Proc.Encrypt('captiva', ieeaTEA2);
ImageEnView1.IO.SaveToFile('crypted.png'); // Saving to lossless format


Demo  Demos\Other\Encrypt\Encrypt.dpr