How to forget a secret

摘要: We uncover a new class of attacks that can potentially affect any cryptographic protocol. The attack is performed by an adversary at some point has access to the physical memory participant, including all its previous states. In order protect protocols from such attacks, we introduce primitive call erasable memory. Using this primitive, it possible implement essential action forgetting secret. show how use small in transform large non-erasable into and In practice, shows turn type storage device selectively forget. Moreover, transformation be using minimal assumption existence one-way function, implemented block cipher, which case quite efficient. conclude suggesting concrete implementations amounts