Key generation, subkeys and improved documentation

Philip Jackson philip.jackson at
Mon Jan 5 21:52:36 CET 2015

On 05/01/15 16:54, Sandeep Murthy wrote:
> I thought the maximum was 4096?  For example, GPGKeychain (the GUI keychain
> utility from the GPGTools suite which installs the GnuPG/MacGPG) doesnt’t allow
> key sizes bigger than 4096.  In any case, choosing 8192 fails with `gpg`:
>     gpg: keysize invalid; using 4096 bits

It is possible to create keys larger than 4096.  When I was on Windows, there
was a discussion on the gpg4win forum which gave steps to create an 8192 key
pair.  I followed the procedure out of curiosity and I do now have an 8192 key
which I've never used (for various reasons).

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