Code Obfuscation via Local Mixing
This article explores 'local mixing,' a novel approach to cryptographic obfuscation that moves away from traditional mathematical assumptions like prime factorization. It draws inspiration from symmetric cryptography and hash function design to create secure, functionality-preserving circuits.
Why it matters
If successful, local mixing could provide a more efficient and viable path toward practical cryptographic obfuscation, which is currently hindered by massive computational overhead.
Dark Mode Toggle Obfuscation (Part III): Local Mixing 2026 Aug 21 See all posts Obfuscation (Part III): Local Mixing Special thanks to Nicholas Ho, Ran Canetti and Janmajaya Mall for feedback and review
In the last two parts of this series, we have gone through two of the major families of cryptographic obfuscation (iO) protocols: the mainstream and conservative line that tries to build it from somewhat-close-to-standard cryptographic assumptions, but at the cost of galactic overhead, and diamond iO, which adds more novel lattice-based assumptions, and reduces the overhead massively - but still not by enough to make it viable to run. In this post, we will go through the third major family being worked on today, called "local mixing".
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