Jack Grigg

I'm a cryptographic engineer trying to improve people's privacy.

You can find me online at these locations (activity not guaranteed):

• GitHub
• Bluesky
• Mastodon
• cohost
• The Bird Site

I occasionally write things and post them on words.str4d.xyz.

Specifications

Some of the specifications I have helped to design and/or write:

• The Zcash Protocol, and various Zcash Improvement Proposals.
• IRTF draft: The ristretto255 and decaf448 Groups
• The age plugin specification
• ristretto255 VRF

Software

Some of the software I have built and/or maintain:

• rage: A Rust implementation of age file encryption. Also available as a Rust crate!
• age-plugin-yubikey: A plugin for age clients which enables files to be encrypted to age identities stored on YubiKeys.
• Zcash: a digital currency using zero-knowledge proofs for privacy. I've been one of the primary maintainers of the zcashd full node implementation since 2016.