OpenPGP card v2.1 and Cherry ST-2000U - Only 1024-bit keys are possible

Thomas Jarosch thomas.jarosch at intra2net.com
Thu Sep 10 17:39:15 CEST 2015


Hi Guan,

On Thursday, 10. September 2015 16:23:18 Guan Xin wrote:
> I'm new to gpg. Just got a Cherry ST-2000U and OpenPGP card v2.1.
> I can generate 1024-bit keys with the "generate" command of gpg2.
> However, generation of 2048 or 4096-bit keys never succeed. 
> ...

> Software versions:
> gpg (GnuPG) 2.0.29
> libgcrypt 1.5.3

what worked for me was using gnupg 2.1.6 together
with the Cherry ST-2000 + opengpg card v2.1.

Can you try to upgrade?

Thomas




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