Maybe a good date to create a new key pair ...

Stefan Claas sac at
Mon Feb 3 23:56:24 CET 2020

vedaal at wrote:

> On 2/3/2020 at 4:48 PM, "Stefan Claas via Gnupg-users"  wrote:Mark
> wrote:
> > I know the palindrome day was yesterday (although the article missed
> > several others in the 21st century). I am curious on how you were
> able
> > to create a key with a certain fingerprint.
> I used the (Windows) program scallion, from GitHub, with the following
> parameters: scallion --gpg -k 2048 02022020
> That's all and it took less than five seconds to generate the private
> key. :-)
> That way you can also create keys with your birthday or deadbeef etc.
> After key generation you have to import the private key into GnuPG
> with '--allow-non-selfsigned-uid' to add a proper UID and passphrase.
> =====
> So, could you pipe in a script to create a fingerprint with the
> following form:
> n1 n2 n3 n4 n5 n6 n7 n8 n9 n10 n11 n12 n13 n14 n15 n16 n17 n18 n19 n20
> n20 n19 n18 n17 n16 n15 n14 n13 n12 n11 n10 n9 m8 n7 n6 n5 n4 n3 n2 n1
> where each n is a character of (1, 2, 3, 4, 5, 6, 7, 8, 9, 0, A, B, C,
> D, E, F),
> and where each n is allowed to be repeated, as long as it is the same
> in its' corresponding mirror position,
> i.e.,  n1 can = n3  as long as it is present in the first, and third
> and thirty-eighth and fortieth position of the fingerprint).
> It might not be that simple, but it doesn't seem impossible, to create
> a Palindromic fingerprint,
> (and just reset your computer clock to 02/20/2020 at 02:20 am)  8^))
> vedaal

The proplem is not piping etc., because I can input also a complete
Fingerprint. The problem is the computation time, like the same as
factoring a large modulus n.

As an example I just did as input only the short string 'deadbeefdeadbeef'
and it would take on my little GPU (see Predicted):

scallion --gpg -k 2048 deadbeefdeadbeef
Cooking up some delicious scallions...
Using kernel optimized from file (Optimized4)
Using work group size 32
Compiling kernel... done.
Testing SHA1 hash...
CPU SHA-1: d3486ae9136e7856bc42212385ea797094475802
GPU SHA-1: d3486ae9136e7856bc42212385ea797094475802
Looks good!
LoopIteration:3689  HashCount:61891,15MH  Speed:2886,7MH/s  Runtime:00:00:21  Predicted:36980.10:50:46
Stopping the GPU and shutting down...


NaClbox: 4a64758de9e8ceded2c481ee526440687fe2f3a828e3a813f87753ad30847b56
    certified OpenPGP key blocks available on

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