Key Length Correlation
I've read Blaze and diffie's paper on Semetric Key Length. I'm currious how semetric key length correlates to public key cryptography length. Does public key length have to be much longer, (assuming the algorithms are strong), to provide the same level of security as a shorter semetric key? TIA -- According to John Perry Barlow: *What is EFF?* "Jeff Davis is a truly gifted trouble-maker." *email <info@eff.org>* *** O U T L A W S On The E L E C T R O N I C F R O N T I E R **** US Out Of Cyberspace!!! Join EFF Today! *email <membership@eff.org>*
Jeff Davis said:
I've read Blaze and diffie's paper on Semetric Key Length. I'm currious how semetric key length correlates to public key cryptography length. Does public key length have to be much longer, (assuming the algorithms are strong), to provide the same level of security as a shorter semetric key? TIA --
It's been calculated that in the case of PGP, to equal the work factor to brute force the 128 bit IDEA key would require a RSA key > 3000 bits. Someone probably has a reference. -- Kevin L. Prigge | "I rarely saw people sitting at Systems Software Programmer | computers producing real code Internet Enterprise - OIT | wearing ties." - Philippe Kahn University of Minnesota | (speech at Software Development '90)
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Jeff Davis -
Kevin L Prigge