This port makes suitable for printing backups of gnupg private keys, the
format of the default backup file is:
1: 00 04 14 7A 2E F2 2E 5C CA 00 F5 C4 D9 3C A9 83 EF F8 7C 2A 54 4B ADF25B
2: 03 CB 00 0B FF 51 E2 FE 8B 9B 51 EC BA E5 02 7D A2 FB 55 DC C0 63 0EB985
3: 7C AE 4E 44 B9 82 0A 46 23 8F E0 87 A1 FC C9 62 9D 6D FA 07 53 11 41FCBB
4: 7B 11 DC 9B 13 EB CD C2 15 1A 11 0A 69 72 71 0B 2C 75 6B 48 74 C4 12D73F
[...]
It's bytes with CRC at the end, a person can OCR it or ask the
program for raw ouput, which (as the homepage says) can be feed to QR
generation.
Comparing to printing and OCR'ing armored private keys from gpg I see
CRC checksums as advantage, with which the software can give you useful
hints like this:
CRC on line 1 does not match (AAAAAA!=BBBBBB)
Comment:
gpg private key backups, suitable for printing
Description:
Due to metadata and redundancy, OpenPGP secret keys are significantly larger
than just the "secret bits". The secret key contains a complete copy of the
public key. Since the public key generally doesn't need to be escrowed, only
archiving the secret parts can be a real advantage.
Paperkey extracts just those secret bytes and prints them. To reconstruct, you
re-enter those bytes (whether by hand, OCR, QR code, or the like) and paperkey
can use them to transform your existing public key into a secret key.
Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org>
WWW: http://www.jabberwocky.com/software/paperkey/
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