International Data Encryption Algorithm

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International Data Encryption Algorithm

(algorithm, cryptography)
(IDEA) A conventional encryption algorithm, written by Xuejia Lai and James Massey, in 1992.

It is a block cipher, considered to be the best and most secure available, and operates on 64-bit blocks with a 128 bit key.

It is used by Pretty Good Privacy.
This article is provided by FOLDOC - Free Online Dictionary of Computing (
References in periodicals archive ?
Therefore, traditional methods such as advanced encryption standard (AES), data encryption standard (DES), or international data encryption algorithm (IDEA) are not effective options for image encryption [3, 4].
Although there exist some classical schemes such as Data Encryption Standard (DES), Advanced Encryption Standard (AES), and International Data Encryption Algorithm (IDEA) for information security [1], they usually cannot be directly applied to image encryption to yield satisfactory results due to some intrinsic properties of images such as bulky data capacity, strong correlation, and high redundancy [2-4].
IDEA (International Data Encryption Algorithm) A relatively new private-key algorithm; a block cipher that uses eight iterations.

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