network profile
| bio | website | callas.org/jon |
|---|---|---|
| location | Hilbert Space | |
| age | ||
| visits | member for | 1 year, 2 months |
| seen | Dec 15 '12 at 1:46 | |
| stats | profile views | 18 |
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.
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Mar 6 |
awarded | Yearling |
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Dec 12 |
answered | Are there any standards of multi-prime RSA key generation? |
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Dec 12 |
answered | Can I use PGP to sign a message without providing cryptographic non-repudation? |
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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)? |
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Oct 30 |
answered | Can ElGamal encryption and ElGamal signatures be used together sharing the same key-pairs? |
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Oct 24 |
comment |
Could the Enigma algorithm be classified as a Feistel network? Stream ciphers operate on characters, or arguably even bits in a stream. For Enigma, it's characters. Binary ones like Lorentz or RC4 can be thought to work on bits. Engima takes a character, rattles it around a path and it goes to another character map. (And the wheels ratchet one place.) Computer stream ciphers are a PRNG that is XORed onto the plaintext to yield ciphertext. Block ciphers take a binary block and the key giving another block. That's it. We use chaining modes to encrypt more than one block, but it works on blocks. It is a mapping of input blocks of bits to output blocks. |
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Oct 2 |
answered | What's the fundamental difference between Diffie-Hellman and RSA? |
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Oct 2 |
answered | Could the Enigma algorithm be classified as a Feistel network? |
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Oct 2 |
answered | When is each key used when encrypting an email using OpenPGP? |
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Sep 25 |
answered | Which is more secure using a CSPRNG for a One-time pad, or AES? |
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Aug 21 |
comment |
Are there hash algorithms with variable length output? Actually, the SHA-3 schedule is "by the end of 2012" so it's about where one would expect. |
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Jul 31 |
answered | Purpose of outer key in HMAC |
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Jul 31 |
answered | Purpose of outer key in HMAC |
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Jul 10 |
answered | RC4 Keylength Limits |
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Jun 19 |
comment |
What algorithm does PGP use to encrypt email? I wouldn't point to pgpi.org. It's over a decade out of date and not maintained. But great answer. -- Jon |
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Jun 19 |
answered | two public keys with same passphrase insecure? | can two hashes be compared? |
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Jun 19 |
answered | Is compressing data prior to encryption necessary to reduce plaintext redundancy? |
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Jun 19 |
comment |
OpenPGP Signature Packet hashed data You guys have it sorted out, it seems. You're right, it's sometimes difficult to describe code in English. -- Jon |
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Jun 19 |
answered | Is the “Signed on date” of a PGP Signature Verified? |
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Jun 19 |
answered | How exactly are GPG keys mathematically related, and prime numbers inside of GPG general |
