What is IDEA
What is IDEA? Explain it briefly.
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IDEA (abbreviated as International Data Encryption Algorithm) is the second version of a block cipher designed and represented by Lai and Massey. This is a 64-bit iterative block cipher with 128-bit key and 8 rounds. Whereas the cipher is not Feistel, decryption is taken out in similar manner as encryption once the decryption subkeys have been computed from the encryption subkeys. The cipher structure was designed to be simply implemented in both hardware and software, and the security of IDEA relies on the utilization of three incompatible kinds of arithmetic operations on 16-bit words. The speed of IDEA in software is alike to that of DES.
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