On the other hand, to demonstrate its constructiveness, we prove the balanced Feistel cipher with random functions and the multiple Even-Mansour cipher.
meaningfulness, we prove that the known- key attacks on block ciphers with ideal primitives to date violate security under known- key indifferentiability. We introduce the notion of known- key indifferentiability to capture the security of such block ciphers under a known key.
Towards understanding the known- key security of block ciphersĪndreeva, Elena Bogdanov, Andrey Mennink, BartĬiphers based on ideal components such as random permutations and random functions as well as propose new generic known- key attacks on generalized Feistel ciphers. As we know that the minimum key space to resist brute-force attack is 2100, and it is. Parameter of logistic map acts as a secret key. Message- embedded scheme using non-linear feedback shift register as non-linear function and 1-D logistic map as chaotic map is modified, analyzed and tested for avalanche property and strength against known plaintext attack and brute-force attack. The proposed hybrid message embedded scheme consists of hill cipher combined with message embedded chaotic scheme. Hybrid Message- Embedded Cipher Using Logistic Map
