Hi, On Wed, Jan 02, 2019 at 04:02:03PM +1100, gn...@raf.org wrote: > For some dumb reason I think I was hoping that the RSA > algorithm wasn't really used to encrypt all the data. I > thought it was probably used to encrypt a per-file > randomly-generated symmetric key which was then used to > encrypt the file (and was encrypted along with the > file) because it could be faster. But I think I'm > confusing it with network protocols like TLS. > > Is that what happens with RSA in gpg? [Probably not]
Actually yes, that’s exactly what happens. The data (in your case, the contents of your file) is symmetrically encrypted using a randomly generated “session key”, and *that* key is asymmetrically encrypted using the RSA public key. Cheers, - Damien
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