Vitalik: Obfuscation and Blockchains Could Enable a “Trustless Trusted Third Party,” but Remain Far From Practical Ethereum co-founder Vita…
Vitalik: Obfuscation and Blockchains Could Enable a “Trustless Trusted Third Party,” but Remain Far From Practical
Ethereum co-founder Vitalik Buterin wrote that obfuscation is one of the most powerful primitives in cryptography, allowing a program to be turned into an “encrypted program” that hides its internal logic while still producing the same outputs.
He said obfuscation, combined with blockchains, could enable secure, private and collusion-resistant applications with almost no trust assumptions, but obfuscated programs cannot handle stateful things like money on their own because they can be copied.
Vitalik noted that researchers now know how to achieve indistinguishability obfuscation under reasonable security assumptions, but runtimes remain “galactic” and may exceed the lifetime of the universe. Future paths include optimizing existing lattice-based constructions, using more aggressive cryptographic lattice assumptions, or exploring new non-lattice approaches; if successful, almost any protocol described with an idealized trusted third party could be securely implemented.
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