[Ilugc] 1024 bit dsa key pair ??
- From: arvindn@xxxxxxxxxxxxxxxxxxxxxxxxxx (Arvind Narayanan)
- Date: Fri, 23 Apr 2004 20:04:20 +0530
On Fri, Apr 23, 2004 at 09:05:48AM -0500, Tom Jose Tharayil wrote:
I have seen the movie swordfish.....but this is stretching it...
Is it usual to see a 1024 bit dsa key pair or am I seeing things ?
just generated this on a solaris box.
Hi,
There are two kinds of cryptographic algorithms: single-key, or
symmetric algorithms and two-key or assymmetric algorithms. They
have different properties and are used for different purposes.
There is no relation between the key sizes of the two.
Currently the standard for the former type is 128 bits, and for
the latter it is 1024 bits. I think that's the source of your
confusion.
I'm not familiar with the movie in question, but 128 bit symmetric
keys are currently *not* breakable (assuming, of course, that the
algorithm itself doesn't have weaknesses. But then any crypto
algorithms shown in movies are unlikely to be more secure than rot13 ;-)
Useful link:
http://en.wikipedia.org/wiki/Key_size
Arvind
--
Q: Do you ever think about quantum computing?
Linus: I think that's a load of bull.
(From a Linux Lunacy cruise interview. After the presumptuous disparagement
of QC, Linus goes on to confuse it with DNA computing.)
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