Re: [OT] Interference by multiple encryption.

[Christian Kujau <evil@xxxxxxxxxx>]

markus reichelt schrieb:
> i faintly remember that one of these two algos, twofish or blowfish,
> is not to be used for large amounts of data, like 200 GB or so. i
> don't recall the speficics, only remember that there was some kind of
> catch to it. any info on this would be greatly appreciated.

i think it was a general issue with block-ciphers, as detailed here:

http://www.cryptolabs.org/aes/WeisLucksAESattacksDS1202.html

(in german, look for the "Alternativen" part of the essay)

> ack again, different algos -> common sense. in fact, i only know of
> multi enc using the same algo in theory, not one single real world
> case.

the CryptoPhone uses 2 different ciphers: AES256 and Twofish:
http://www.cryptophone.de/
however i don't know if anyone actually uses it.

Christian.
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