gpg: NOTE: cipher algorithm 9 not found in preferences
Stefan H. Holek
Mon Mar 12 10:50:02 2001
--On Samstag, 10. März 2001 10:54 -0800 Nick Andriash
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> Hash: SHA1
> > On March 10, 2001 at 10:52:42 AM, Marco van Lienen wrote:
> >> When I encrypt a PGP/MIME message to myself and decrypt it, gpg gives me
>> a note saying: gpg: NOTE: cipher algorithm 9 not found in preferences
> > I noticed you never did get an answer to your question on-List... did you
> receive one off-List? If so, would you mind passing it on to me, as that
> very question has plagued me ever since installing GPG. I've asked the
> question as well, and strangely enough no one seems to know the answer...
> or is ignoring us. ;o)
This means something like:
a) You have selected RIJNDAEL256 (sym 9) as your symmetric alg
b) The key you have been encrypting to is not offering this algorithm in its preferred sym alg subpacket.
If you type gpg --list-packets thekeyfile.asc you might see: ...
hashed subpkt 11 len 5 (pref-sym-algos: 7 10 3 4)
Which means: RIJNDAEL128, Twofish, CAST5, Blowfish
c) GnuPG has used sym alg 9 for encryption (as told) and gives the
mentioned notice when decrypting.
d) There should be no need to specify a sym alg in normal operation
as it will automatically be selected form the key preferences.
Things work better when plugged in.