---
title: "A blueprint for formal verification of Apple corecrypto"
url: https://daily.dev/posts/a-blueprint-for-formal-verification-of-apple-corecrypto-nstkdfael
source_url: https://security.apple.com/blog/formal-verification-corecrypto
type: article
source: "Hacker News"
published: 2026-05-23T05:38:20.469Z
updated: 2026-05-23T05:38:44.772Z
tags: ["quantum-computing", "cryptography"]
reading_time: 16
upvotes: 5
comments: 0
language: en
---

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# A blueprint for formal verification of Apple corecrypto

**[Hacker News](https://daily.dev/sources/hn)** · 16 min read · 5 upvotes · 0 comments

## Summary

Apple has released the source code for its corecrypto library along with formal mathematical proofs verifying the correctness of its ML-KEM and ML-DSA (post-quantum cryptography) implementations against FIPS 203 and FIPS 204 specifications. The approach combines Cryptol, SAW, and Isabelle proof assistants with a custom Cryptol-to-Isabelle translator built by Galois. The verification covers both portable C code and hand-optimized ARM64 assembly, requiring over 50,000 proof steps. Formal verification caught real bugs — including a missing step in an early ML-DSA implementation that could silently corrupt cryptographic computations — that conventional testing would have missed. Apple is open-sourcing the verification libraries, Isabelle theories, and tooling to advance the state of the art in critical software assurance.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://security.apple.com/blog/formal-verification-corecrypto>

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---

Tags: [#quantum-computing](https://daily.dev/tags/quantum-computing), [#cryptography](https://daily.dev/tags/cryptography)

[View this post on daily.dev](https://daily.dev/posts/a-blueprint-for-formal-verification-of-apple-corecrypto-nstkdfael)