# diskperf-y ?

**FRANK HUBENY
**
teenieberry@worldnet.att.net

*Tue Jan 1 14:53:01 2002*

Hello;
Thank you for your respones. I was just wondering because when I used
"pgp", it told you how big. Some would even go as high as a "8k" key.
I did try and make one once it took 36 hours to make a "8k" RSA key.
And "1" hour to encrypt a small file.
My version of "gpg" does not allow one to generate a "rsa" key. I
suppose a future version will allow one to generate a different key. A
newer version of pgp263 does allow one to generate lots of different
ones. But I also understand that I can change the cypher used in "gpg".
<><
Frank D. Hubeny
>* according to keygen.c the largest key is 4096 bits. The main
*reason
>* why you might not want to use a number so large is the amount of
*time
>* to
*>* generate the public and private keys and also, to a much smaller
*>* extent,
*>* the amount of time to encrypt a message with the public key.
*>*
*>* Of course the longer your key is, in general, the more security you
*>* will have. RSA's security depends on very very large integers that
*>* are the product of 2 prime numbers that are nearly equal in bit
*>* length.
*