Interpolation attack
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In cryptography, an interpolation attack is type of cryptanalytic attack against block ciphers.
In the attack, an algebraic function is used to represent an S-box. The algebraic function may be a simple quadratic, or a polynomial over a Galois field. Once the algebraic function, or functions, have been determined the coefficients of the polynomial expression of the encryption function are guessed.
[edit] References
T. Jakobsen, L. R. Knudsen. The interpolation attack on block ciphers. In Fast Software Encryption, Haifa, Israel, Lectures Notes in Computer Science 1267, pp. 28--40, Springer-Verlag, 1997.
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