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Linear Structures in Blockciphers by Jan-Hendrik Evertse studies the existence of linear properties within block cipher encryption systems and how such structures may weaken their security. A block cipher is designed to transform plaintext into ciphertext using a secret key, ensuring that the relationship between plaintext and ciphertext is unique for each key. The paper analyzes situations where a cipher may exhibit partial linearity, meaning that certain linear relationships exist between plaintext, key, and ciphertext. If such linear mappings exist, they can significantly reduce the complexity of recovering the secret key compared with a full brute-force search.

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245: $a: Linear Structures in Blockciphers
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082: $a:
100: $a: Jan-Hendrik Evertse
650: $a: Cryptography
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250: $b: Springer
250: $c: 1988
020: $a: 978-0387189807
300: $a: 18