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seen Jun 10 '13 at 21:00

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comment What are the implications of NSA surveillance on the average internet user?
@zuallauz That is an interesting post by Bruce Schneier, but the quote doesn't refer to any backdoor in the AES algorithm but is mostly a consequence of the poor key scheduler. In fact Bruce Schneier has a sensible position: " can the NSA break AES? My guess is that they can't. That is, they don't have a cryptanalytic attack against the AES algorithm that allows them to recover a key from known or chosen ciphertext with a reasonable time and memory complexity." Sidechannel attacks and weak password are the problem, not AES.
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comment What are the implications of NSA surveillance on the average internet user?
@zuallauz A couple reasons why I think it is unlikely that the NSA has some sort of backdoor/attack against AES. The NSA did know about differential attacks against DES, but decided to design the S-Boxes in a way that makes them even more secure. And, those were very different times. Not many people did research in cryptography outside of the intelligence community and they had a massive advantage. Since the 90s and the ascend of the internet, cryptography has become important in many commercial enterprises and now there is a lot of funding outside of secret services.
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comment How large blocks does AES-cbc use with a 128 bit key and with a 192-bit key?
@AviD: I think he meant to say 128-bit blocks.
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accepted Dictionary Attack on Wifi
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revised How large blocks does AES-cbc use with a 128 bit key and with a 192-bit key?
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answered How large blocks does AES-cbc use with a 128 bit key and with a 192-bit key?
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revised How can an access point spoof me into connecting?
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asked How can an access point spoof me into connecting?
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asked Dictionary Attack on Wifi