http://www.samsimpson.com/cryptography/pgp/pgpfaq.html PGP DH vs. RSA FAQ Copyright (c) 1999 S.Simpson - All Rights Reserved
A bit old, but I still found it interesting when I read it (wasn't quite so old then :). -- Roscoe On Nov 26, 2007 7:26 PM, <[EMAIL PROTECTED]> wrote: > Hello, > > I need to create a subordinate key, which will be used for > encryption only. I tried to find out how RSA differ from ElGamal by > searching on the web, but I did not find much useful information. > There are some pages that explain the algorithms in detail, but I'm > not smart enough to evaluate their security and efficiency just by > looking at the algorithms. > > So it would be great if someone could tell me how they differ when > it comes to security and efficiency. I know that "A disadvantage of > the ElGamal system is that the encrypted message becomes very big, > about twice the size of the original message", and that both seem > to be limited to use no larger than 4096-bit keys, but that's all I > know. Please don't give me "they're both secure enough" or "just > use the defaults" type of answers, I want detailed information. > > Are there any patent issues with ElGamal? The Wikipedia article > mentions nothing about a patent. I found this: "Although the > inventor, Taher Elgamal, did not apply for a patent on his > invention, the owners of the Diffie-Hellman patent (US patent > 4,200,770) felt this system was covered by their patent". > > I know that RSA was published in 1977, and the patent on it ran out > in 2000. ElGamal is from 1984, so if there's a patent on it, will > it expire/has it expired in 2007? > > -AT > > > -- > Click for free information on obtaining a second mortgage. > http://tagline.hushmail.com/fc/Ioyw6h4d9S3P7xUJExjzpNqgOBe2rFdrpuVjhhjhKmemC0ABSFRXmX/ > > > _______________________________________________ > Gnupg-users mailing list > [email protected] > http://lists.gnupg.org/mailman/listinfo/gnupg-users > _______________________________________________ Gnupg-users mailing list [email protected] http://lists.gnupg.org/mailman/listinfo/gnupg-users
