A General Analysis of the Security of Elastic Block Ciphers
Debra L. Cook; Moti Yung; Angelos D. Keromytis
- A General Analysis of the Security of Elastic Block Ciphers
Cook, Debra L.
Keromytis, Angelos D.
- Technical reports
- Computer Science
- Permanent URL:
- Columbia University Computer Science Technical Reports
- Part Number:
- Department of Computer Science, Columbia University
- Publisher Location:
- New York
- We analyze the security of elastic block ciphers in general to show that an attack on an elastic version of block cipher implies a polynomial time related attack on the fixed-length version of the block cipher. We relate the security of the elastic version of a block cipher to the fixed-length version by forming a reduction between the versions. Our method is independent of the specific block cipher used. The results imply that if the fixed-length version of a block cipher is secure against attacks which attempt key recovery then the elastic version is also secure against such attacks.
- Computer science
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