Posts tagged “cryptography”

Privacy Technologies for Bitcoin

The Zerocash Team, Greg Maxwell, and LeastAuthority on June 15, 2015

Introduction The world still needs Zerocash even though we now have Confidential Transactions. A message from Zooko Wilcox-O'Hearn: At Least Authority, our mission is to bring verifiable end-to-end security to every user of the Internet. As a part of this mission, we are working on something that we can't announce yet, but it involves the Zerocash protocol for private Bitcoin transactions. Recently Blockstream announced Sidechains Elements, which includes a privacy protocol named...

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A Bug in libsnark

Zooko Wilcox-O'Hearn, Alessandro Chiesa, Eli Ben-Sasson, Eran Tromer, Madars Virza on May 16, 2015

A statement from Least Authority Zooko Wilcox-O'Hearn writing: About us At Least Authority, our mission is to bring verifiable end-to-end security to everyone. As a part of this mission, we have been collaborating with the scientists behind zk-SNARKS, libsnark, and Zcash. These are some of the most promising new advances in cryptography, and we are exploring whether they can be used to provide more safety and freedom to all users of the Internet. We're not ready to post about our specific...

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BLAKE2: “Harder, Better, Faster, Stronger” Than MD5

Zooko Wilcox-O'Hearn on March 21, 2014

Best read while listening to Daft Punk: Harder, Better, Faster, Stronger Why use BLAKE2 instead of Skein, Keccak (SHA-3), MD5, or SHA-1 as a secure hash function? BLAKE was the best-rated hash function in the SHA-3 competition NIST, in the final report of the SHA-3 competition, said this about the finalists (which included BLAKE, Keccak, Skein, and Grøstl): BLAKE had a security margin — the gap between a known-weak reduced version and the full version — comparable to Keccak and superior to...

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