3,394 reputation
720
bio website ripple.com
location Oakland, CA
age 45
visits member for 3 years, 3 months
seen Nov 10 at 2:19

I am Chief Cryptographer at Ripple Labs and one of the architects of the Ripple payment system.


Jul
4
revised length-extension wiki description
The MAC/hash does change, it just changes in a way that allows the attacker to maintain its validity.
Jan
17
revised What does a “cycle” mean in cryptography benchmarks?
deleted 31 characters in body
Nov
6
revised finding collision for truncated SHA1 hash output
added 252 characters in body
Aug
23
revised What is the effect of the different AES key lengths?
added 294 characters in body; added 87 characters in body
Jul
16
revised Is it possible to ensure security with zero pre-shared information?
added 466 characters in body
Jul
16
revised Is it possible to ensure security with zero pre-shared information?
added 924 characters in body; added 35 characters in body; added 483 characters in body
Jul
11
revised What differentiates a password hash from a cryptographic hash besides speed?
added 3 characters in body
Jun
27
revised How can I validate a hashed password if all I have is another hash?
added 334 characters in body
Jun
5
revised Proof of work scheme with one and only one correct answer
added 235 characters in body
May
24
revised How can encryption involve randomness?
added 363 characters in body
Jan
12
revised Two mutually untrusted parties want to exchange data: how to ensure each one gets the data it needs?
edited body
Jan
12
revised Compressing EC private keys
added 129 characters in body
Jan
12
revised Two mutually untrusted parties want to exchange data: how to ensure each one gets the data it needs?
added 875 characters in body
Jan
12
revised Two mutually untrusted parties want to exchange data: how to ensure each one gets the data it needs?
added 14 characters in body
Jan
12
revised Two mutually untrusted parties want to exchange data: how to ensure each one gets the data it needs?
added 387 characters in body
Nov
20
revised Derived Shared Key vs Distinct Keys?
added 871 characters in body
Sep
30
revised How does one scale encryption strength upwards from 256-bit?
deleted 8 characters in body
Sep
25
revised Hashing or encrypting twice to increase security?
added 341 characters in body
Sep
20
revised Is Convergent Encryption really secure?
added 53 characters in body
Aug
26
revised Prevent double-spending with decentralized digital currencies without all transactions being public?
added 1404 characters in body