Most cited

Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 900 posts.

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123

Warrant Canary Frequently Asked Questions

What is a warrant canary? A warrant canary is a colloquial term for a regularly published statement that a service provider has not received legal process that it would be prohibited from saying it had received. Once a service provider does receive legal process, the speech prohibition goes into...

139

Why Constant-Time Crypto?

In 1996, Paul Kocher published a novel attack on RSA, specifically on RSA implementations , that extracted information on the private key by simply measuring the time taken by the private key operation on various inputs. It took a few years for people to accept the idea that such attacks were practical and could be…