Tight Security of TNT and Beyond: Attacks, Proofs and Possibilities for the Cascaded LRW Paradigm

ePrint Report: Tight Security of TNT and Beyond: Attacks, Proofs and Possibilities for the Cascaded LRW Paradigm

Ashwin Jha, Mustafa Khairallah, Mridul Nandi, Abishanka Saha

Liskov, Rivest and Wagner laid the theoretical foundations for tweakable block ciphers (TBC). In a seminal paper, they proposed two (up to) birthday-bound secure design strategies --- LRW1 and LRW2 --- to convert any block cipher into a TBC. Several of the follow-up works consider cascading of LRW-type TBCs to construct beyond-the-birthday bound (BBB) secure …

attacks beyond block ciphers eprint report foundations paradigm report security wagner