Suggest me the best image encryption algorithm

Hi I am Sai and I am looking for an image encryption algorithm that is

Priority 1 : Light (Less time consuming) and

Priority 2 : Efficient (Strong)

Please help me with your suggestions.

Thanks in advance!

Answer 1

[Jan]

A short answer: AES-CBC.

An implementation:

key  = uint8('myPassword');
data = randi([0, 255], 640, 480, 3, 'uint8');

% Get a 16 byte hash from the password:
Hashing = java.security.MessageDigest.getInstance('MD5');
Hashing.update(key);
Hash    = typecast(Hashing.digest, 'uint8');

% Set up algorithm:
Engine = javax.crypto.spec.SecretKeySpec(Hash, 'AES');
Cipher = javax.crypto.Cipher.getInstance('AES/CBC/PKCS5Padding');

% Encrypt:
Cipher.init(javax.crypto.Cipher.ENCRYPT_MODE, Engine);
encrypted = typecast(Cipher.doFinal(data(:)), 'uint8');

% Decrypt:
Cipher.init(javax.crypto.Cipher.DECRYPT_MODE, Engine);
decrypted = typecast(Cipher.doFinal(encrypted(:)), 'uint8');

% Compare the results - of course the shape of the array has not been
% considered yet:
isequal(decrypted(:), data(:))

ans = logical
   1