1,253 reputation
25
bio website callas.org/jon
location Hilbert Space
age
visits member for 2 years, 9 months
seen Sep 2 at 6:55

Cryptographer. Co-author of OpenPGP, DKIM, syslog-sign, ZRTP, the Skein hash function, Threefish cipher, and other things.

Businessman. Co-founder of PGP Corporation, Silent Circle, World Benders, and others. Presently CTO at Entrust.

Software engineer. Worked at the above as well as Apple, DEC, NASA, and others.


Nov
19
answered Has threefish successfully been attacked (practically or theoretically)?
Jun
19
answered How to build an electro-mechanical public key cipher machine?
Dec
12
answered Are there any standards of multi-prime RSA key generation?
Dec
12
answered Can I use PGP to sign a message without providing cryptographic non-repudation?
Oct
30
answered Is an RSA variant with public exponent $e=f+(p-1)\cdot(q-1)$ safe (for $f$ random in some small interval)?
Oct
30
answered Can ElGamal encryption and ElGamal signatures be used together sharing the same key-pairs?
Oct
2
answered What's the fundamental difference between Diffie-Hellman and RSA?
Oct
2
answered Could the Enigma algorithm be classified as a Feistel network?
Oct
2
answered When is each key used when encrypting an email using OpenPGP?
Sep
25
answered Which is more secure using a CSPRNG for a One-time pad, or AES?
Jul
31
answered Purpose of outer key in HMAC
Jul
31
answered Purpose of outer key in HMAC
Jul
10
answered RC4 Keylength Limits
Jun
19
answered two public keys with same passphrase insecure? | can two hashes be compared?
Jun
19
answered Is compressing data prior to encryption necessary to reduce plaintext redundancy?
Jun
19
answered Is the “Signed on date” of a PGP Signature Verified?
Jun
19
answered How exactly are GPG keys mathematically related, and prime numbers inside of GPG general
Jun
19
answered GPG/PGP Verification of Revocation
Jun
19
answered OpenPGP Public-Key Encrypted Session Key Packet Key ID generation
May
29
answered Is every output of a hash function possible?