Re: Secure Science issues preview of their upcoming block cipher

2005-03-28 Thread Ralf-Philipp Weinmann
Jerrold Leichter wrote: I can come up with a cipher provably just as secure as AES-128 very quickly (Actually, based on the paper a while back on many alternative ways to formulate AES - it had a catchy title something like "How Many Ways Can You Spell AES?", except that I can't find one like t

Re: Secure Science issues preview of their upcoming block cipher

2005-03-25 Thread Jerrold Leichter
| Really? How does one go about proving the security of a block cipher? They don't claim that: This cipher is ... provably just as secure as AES-128. I can come up with a cipher provably just as secure as AES-128 very quickly (Actually, based on the paper a while back on many altern

Re: Secure Science issues preview of their upcoming block cipher

2005-03-25 Thread Adam Shostack
Really? How does one go about proving the security of a block cipher? My understanding is that you, and others, perform attacks against it, and see how it holds up. Many of the very best minds out there attacked AES, so for your new CS2 cipher to be "provably just as secure as AES-128," all thos