TImageEnProc.Encrypt
Declaration
procedure Encrypt(const Passkey: AnsiString; Algorithm: TIEEncryptionAlgorithm = ieeaTEA);procedure Encrypt(Passkey: array of byte; Algorithm: TIEEncryptionAlgorithm = ieeaTEA);
Description
Encrypts the current image (layer) using the Tiny Encryption Algorithm with a key of 128 bits:en.wikipedia.org/wiki/Tiny_Encryption_Algorithm
| 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.
Note:
◼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)
Example
ImageEnView1.IO.LoadFromFile('input.jpg');
ImageEnView1.Proc.Encrypt('captiva', ieeaTEA2);
ImageEnView1.IO.SaveToFile('crypted.png'); // Saving to lossless format
Demo
 | Demos\Other\Encrypt\Encrypt.dpr |