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| Linjär kryptanalys× | Sidokanalsanalys× | |
|---|---|---|
| Ämnesområde | Kryptografi | Kryptografi |
| Familj | Machine learning | Machine learning |
| Ursprungsår≠ | 1993 | 1996 |
| Upphovsperson≠ | Mitsuru Matsui | Paul Kocher |
| Typ≠ | linear approximation attack | physical side-channel exploitation |
| Ursprungskälla≠ | Matsui, M. (1993). Linear cryptanalysis method for DES cipher. In Advances in Cryptology - EUROCRYPT 1993, LNCS 765, pp. 386-397. DOI ↗ | Kocher, P. C. (1996). Timing attacks on implementations of Diffie-Hellman, RSA, DSS, and other systems. In Advances in Cryptology - CRYPTO 1996, LNCS 1109, pp. 104-113. DOI ↗ |
| Alias≠ | linear attack, linear approximation, piling-up lemma | SCA, timing attack, power analysis, cache attack |
| Närliggande | 3 | 3 |
| Sammanfattning≠ | Linear cryptanalysis is a known-plaintext attack that exploits linear approximations of a cipher's non-linear transformations to recover secret key bits. Introduced by Mitsuru Matsui in 1993, linear cryptanalysis provides practical attacks on ciphers like DES with computational complexity less than brute force. The technique analyzes statistical biases in how linear combinations of plaintext and ciphertext bits relate to key bits, enabling key recovery with reduced data requirements. | Side-channel analysis is a family of attacks that exploit physical properties of cryptographic implementations (timing, power consumption, electromagnetic emissions, cache behavior) to recover secret keys. Introduced by Paul Kocher in 1996, side-channel attacks have repeatedly broken implementations of theoretically secure cryptosystems by leveraging unintended information leakage. Side-channel analysis has become a critical concern in cryptographic system design, requiring constant-time implementations and physical countermeasures. |
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