Thanks, everyone. So we can see the algorithm, but can not be able to see the compression level used, correct?
Thanks, --Avi ---- User:Avraham pub 3072D/F80E29F9 1/30/2009 Avi (Wikimedia-related key) <avi.w...@gmail.com > Primary key fingerprint: 167C 063F 7981 A1F6 71EC ABAA 0D62 B019 F80E 29F9 On Fri, Mar 11, 2011 at 1:35 PM, David Shaw <ds...@jabberwocky.com> wrote: > On Mar 11, 2011, at 12:50 PM, Avi wrote: > > > Forgive my ignorance, but is there a way to take a given > > encrypted message/file and determine which compression algorithm > > was used (and which level)? I know how to set compression > > algorithm and level prefs, but I'm curious to see what others > > use, if possible. > > You can't tell which compression is used in any arbitrary message since you > need to be able to decrypt it first. If the message is to you, however, you > can run 'gpg --list-packets' on it. > > When running list-packets, you should see a line like this: > > :compressed packet: algo=2 > > Algo 1 == ZIP > Algo 2 == ZLIB > Algo 3 == BZIP2 > > If there is no "compressed packet" line at all, then the message is > uncompressed. > > David > >
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