초록

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Abstract ▼ AI-Helper

In this paper, we deal with block cipher algorithm IDEA(international data encryption algorithm), previously known as typical block cipher system. first of all, analysing key scheduler we classify the key sequences with the used key bit and the unused key bits in each round. with t...

In this paper, we deal with block cipher algorithm IDEA(international data encryption algorithm), previously known as typical block cipher system. first of all, analysing key scheduler we classify the key sequences with the used key bit and the unused key bits in each round. with this properties we propose the two method, which are differential analysis using differences of plaintext pairs and linear analysis using LSB bit of plaintexts and key sequences.