New directions in cryptanalysis of block ciphers.
The algebraic expression of the Advanced Encryption Standard (AES) RIJNDAEL S-box involved only 9 terms. The selected mapping for RIJNDAEL S-box has a simple algebraic expression. This enables algebraic manipulations which can be used to mount interpolation attack. Approach: The interpolation attack...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
Science Publications
2009
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/15799/ http://psasir.upm.edu.my/id/eprint/15799/1/New%20directions%20in%20cryptanalysis%20of%20block%20ciphers.pdf |
| Summary: | The algebraic expression of the Advanced Encryption Standard (AES) RIJNDAEL S-box involved only 9 terms. The selected mapping for RIJNDAEL S-box has a simple algebraic expression. This enables algebraic manipulations which can be used to mount interpolation attack. Approach: The interpolation attack was introduced as a cryptanalytic attack against block ciphers. This attack is useful for cryptanalysis using simple algebraic functions as S-boxes. Results: In this study, we presented an improved AES S-box with good properties to improve the complexity of AES S-box algebraic expression with terms increasing to 255. Conclusion: The improved S-box is resistant against interpolation attack. We can develop the derivatives of interpolation attack using the estimations of S-box with less nonlinearity.
|
|---|