trying to understand UID and subkeys

Felipe Alvarez felipe.alvarez at
Thu Mar 12 11:08:35 CET 2009

On Fri, Mar 6, 2009 at 12:10 AM, David Shaw <dshaw at> wrote:
>> What do the letters to the right of the words "usage" mean? (S,C,A,E) I
>> can only guess |S|ign, |E|ncrypt, ....
> (S)ign: sign some data (like a file)
> (C)ertify: sign a key (this is called certification)
> (A)uthenticate: authenticate yourself to a computer (for example, logging
> in)
> (E)ncrypt: encrypt data
> David

"S" means this key permits the owner to sign things
"C" means that "I (felipe) have signed this key" ??
"E" means owner can encrypt to himself ??

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