david wong

Hey! I'm David, the author of the Real-World Cryptography book. I'm a crypto engineer at O(1) Labs on the Mina cryptocurrency, previously I was the security lead for Diem (formerly Libra) at Novi (Facebook), and a security consultant for the Cryptography Services of NCC Group. This is my blog about cryptography and security and other related topics that I find interesting.

noname developer update #3: user-defined functions posted 3 weeks ago

I guess this is part 3. With part 1 introducing noname, a programming language inspired by rust that makes use zero-knowledge proofs to provide verifiable computation, part 2 going over a simple arithmetic example and part 3 going over custom types.

In this update, I showcase a new feature: functions, and go through the debug compilation of an example program to see if the implementation is sound (that it constrains what it is supposed to constrain). In this video I do something more: I optimize the implementation of assert_eq so that you can see a bit of the compiler internals. I also end the video abruptly, thinking I found a bug in the implementation. If you were an attentive student, you would have figured out that there was no bugs: doing things on constants does not create any gates.

You can play with the noname language here! And you can read the noname book as well.

Well done! You've reached the end of my post. Now you can leave a comment or read something else.

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