Vitalik Buterin
Co-founder of Ethereum. Publishes long essays on mechanism design, governance and what cryptography is for, and returns to his earlier positions to say which parts he no longer holds.
Vitalik Buterin did not write this page.
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Their wordsAs an AI might say, the only honest conclusion (ok fine, the honest punchline) is that a modern cryptographic network like the post-Lean-upgrade Ethereum is called a "blockchain" to a large extent for historical reasons.
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Their wordsThe most important conclusion is that the set of tradeoffs for users is radically changing:
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cryptosoftware performancecryptography
Their wordsPerhaps the most important shift is that the decentralized nature of the network is shifting from being purely a burden incurred in the name of safety and robustness to at least sometimes, in a few limited cases, being a strength even from a performance perspective.
- 5 weeks earlier
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Their wordsBut, so far, mixing has not proved to be good enough. There ended up being too many correlations between values in \(C\) and values in the obfuscation that remained.
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Their wordsA big-enough random reversible circuit is plausibly a secure cryptographic permutation, a big-enough random irreversible circuit degenerates into having only a few possible outputs.
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Their wordsThis is a wild and risky bet; it sits on a graveyard of failed attempts at white-box cryptography .
- 8 weeks earlier
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Our reading
Known iO schemes built on reasonable security assumptions have literally galactic runtimes.
Their wordsBut within the good news, there is bad news: the run time is literally galactic
↗Obfuscation: building the final boss of cryptography (Part I)vitalik.eth.limo
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Their wordsThe most powerful primitive that has been conceived in cryptography is obfuscation
↗Obfuscation: building the final boss of cryptography (Part I)vitalik.eth.limo
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Their wordsit turns out that making a secure form of obfuscation is really really hard
↗Obfuscation: building the final boss of cryptography (Part I)vitalik.eth.limo