On 29/08/17 02:09, s7r wrote: > I understand that the first one is ECDSA and the second is ECDH, but > can't I use the same secp256k1 key (if I import it) but in different two > representations (ECDSA representation for Sign and Certify and ECDH for > Encrypt)?
> The subkey might have a different fingerprint because it's a > different representation of course but this is not the concern, the > concern is for both to be computed from the same imported private key. You can use hash(private_key_1) to seed a cryptographically secure pseudo-random number generator (E.g.: AES in CTR mode with the seed as the key), and then use that random stream to generate (private_key_2, pubic_key_2. This is a method applicable in general. The algorithms of private_key_1 and private_key_2 need not be the same, nor do they need to be defied over the same curve. The only problem is that I do not know of a program to do they key generation from a user-provided seed. -- Do not eat animals, respect them as you respect people. https://duckduckgo.com/?q=how+to+(become+OR+eat)+vegan
signature.asc
Description: OpenPGP digital signature
_______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
