Re: TEA analysis
From: Matt (matt_crypto_at_yahoo.co.uk)
Date: 02/27/04
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Date: 27 Feb 2004 10:22:24 -0800
Derjo Phar wrote:
> has anyone any opinions and/or facts about how useful the TEA is?
Yes, as luck would have it, I've been hacking up a document discussing
TEA, its variants, and known attacks. It contains both opinions and
facts. A draft is available here:
http://www-users.cs.york.ac.uk/~matthew/TEA.ps.gz
> In which situations is it worth using?
IMHO, only if you need to memorise a block cipher or need to implement
one quickly from scratch. I should stress that I think a genuine need
for this is somewhere between "quite rare" and "non-existant".
> In which situations should one avoid using it?
Avoid it when there's a better cipher suitable for your application
;-) For most tasks this is likely to be true (e.g. it's worth looking
at AES.) Certainly don't use TEA for hashing (well, in certain modes,
anyway).
> What variants are there for it?
XTEA, Block TEA, XXTEA
Matt
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