I have some newbie questions that I'm trying to get a handle on. 

I understand there are software products sold that offer 0, 40, and 128 bit
encryption.  I also understand than when you talk about keys that the strength
is measured in bit size.  From what I've read a common size is 512bit and
1024bit.  My question is how are these two items related? Or more acurately,
what does the 128 bit signify on software packages?  Does the 128bit mean the
highest encryption method the software will employ.  As in RSA with RC4 128
MD5?  If that is true then when I generate keys why wouldn't it be a 128 bit
key? 

Next question.  

Bit sizes are only related to key sizes, not certificate sizes?
Correct?  A peer keeps talking about certificate bit size, but I've never seen
a certificate measured in bit size, only keys.

Please correct me if any of my assumptions are wrong.


Thanks
Gary
A
Gary
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