How to NOT Use IDEA?

David Shaw dshaw at
Tue Apr 13 23:19:49 CEST 2010

On Apr 13, 2010, at 4:06 PM, Bill House wrote:

> Surely this is a newbie question, but I have been trying for some time to get GPG to create a signed and encrypted file.  Not wanting to go through the whole recompile thing and not caring to use the IDEA cipher, it seems to me that GPG should simply work by default.  Sadly, it does not seem to work for me.
> I created a new RSA/RSA 2048 key in my keyring.  So long as I only want to encrypt, it works fine.  When I want to encrypt AND sign, it complains that I need the IDEA algorithm.  When I specify the cipher-algo, it either claims the cipher is invalid, or it complains that it cannot use IDEA  -- which is it?  I have tried all the ciphers reported by using gpg --list-packets on the exported keyfile, to no avail.  Here is the example of my command line:
> gpg --armor --cipher-algo cast5 --sign --passphrase yadayada --user someHexID --recipient someHexID --output "output.asc" --encrypt "input.csv"
> I am running the Windows version of gpg 1.4.10b
> Where have I gone wrong?

The --sign command belongs at the end of the line, next to --encrypt.  Also, what program did you use to create that new RSA/RSA 2048-bit key?


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