OpenPgp secret keys
 

I would like to know what the difference between a private key and and secret keyring. Is it safe to backup a secret keyring?

Your secret keyring holds your private keys. Just like the household keyring probably in your pocket, a "keyring" can hold multiple "keys".

You do want to backup your keyrings (both secret and public). If you lose them, you're stuck. So back them up.

Can someone figure out the private key contained in the keyring?
Can I use the same keyring in multiple computers?
If i loose the keyring I can use the revoke key...

The NSA, maybe. The average bloke, no (unless you choose a really useless and easy to crack passphrase to protect your keyring).

Of course.

You would have to send the revokation to a public keyserver, and the people you communicate with would have to refresh their keyrings from the public server. I suppose there is a way to just send the revokation to those you communicate with, if it's a small group and you know everybody who might have your public key.

http://carthik.net/blog/vault/2005/0...-gpg-key-pair/

Hahaha I think OpenPgp has a special back door designed just for them. The chances cracking a very safe password/passphrase are near to zero unless you have a quantum computer... which the NSA has or do they? :P