Cryptobook

[Stefan Claas]

Hi all,

gemini://cryptobook.cities.yesterweb.org/

The above URL is a guestbook on Geminspace,
where users can leave an encrypted message.

For Linux there is elpher (emacs) or the beautiful
Lagrange client, besides others, available.

As username you may choose a hexadecimal IV, nonce, tweak
or whatever you call it and then for the message a hex
encoded string in one line.

Be the first to submit an entry and post the hex key here,
so that we can decrypt the message and let us know what
software you use.

I put later an entry in, with FPE (Format Preserving Encryption)
which should do the job well, hopefully, because I do not know
what the max. line lenght of guestbook entries are.

https://github.com/stefanclaas/ff1

Regards
Stefan

[Stefan Claas]

Post by Stefan Claas
I put later an entry in, with FPE (Format Preserving Encryption)
which should do the job well, hopefully, because I do not know
what the max. line lenght of guestbook entries are.
https://github.com/stefanclaas/ff1

Ok, The cryptobook accepted the Username length of the nonce and
hex message. :-)

Here is the key:

406c7d05dc28874123461b2a1b636acc85745238137b0844bc1363e4d7c827f6

Regards
Stefan