I'm D. J. Bernstein, and this is my personal weblog. Keyboard shortcuts:

- Access-J (e.g., Alt-Shift-J on Firefox): move down to the next blog entry in reverse chronological order.
- Access-K: move up.
- Access-I: index (this page).

Feed: RSS. I also have a moderately active microblog, and in particular systematically link new blog entries from the microblog.

2024.01.02: Double encryption: Analyzing the NSA/GCHQ arguments against hybrids. #nsa #quantification #risks #complexity #costs |

2023.11.25: Another way to botch the security analysis of Kyber-512: Responding to a recent blog post. #nist #uncertainty #errorbars #quantification |

2023.10.23: Reducing "gate" counts for Kyber-512: Two algorithm analyses, from first principles, contradicting NIST's calculation. #xor #popcount #gates #memory #clumping |

2023.10.03: The inability to count correctly: Debunking NIST's calculation of the Kyber-512 security level. #nist #addition #multiplication #ntru #kyber #fiasco |

2023.06.09: Turbo Boost: How to perpetuate security problems. #overclocking #performancehype #power #timing #hertzbleed #riskmanagement #environment |

2022.08.05: NSA, NIST, and post-quantum cryptography: Announcing my second lawsuit against the U.S. government. #nsa #nist #des #dsa #dualec #sigintenablingproject #nistpqc #foia |

2022.01.29: Plagiarism as a patent amplifier: Understanding the delayed rollout of post-quantum cryptography. #pqcrypto #patents #ntru #lpr #ding #peikert #newhope |

2020.12.06: Optimizing for the wrong metric, part 1: Microsoft Word: Review of "An Efficiency Comparison of Document Preparation Systems Used in Academic Research and Development" by Knauff and Nejasmic. #latex #word #efficiency #metrics |

2019.10.24: Why EdDSA held up better than ECDSA against Minerva: Cryptosystem designers successfully predicting, and protecting against, implementation failures. #ecdsa #eddsa #hnp #lwe #bleichenbacher #bkw |

2019.04.30: An introduction to vectorization: Understanding one of the most important changes in the high-speed-software ecosystem. #vectorization #sse #avx #avx512 #antivectors |

2017.11.05: Reconstructing ROCA: A case study of how quickly an attack can be developed from a limited disclosure. #infineon #roca #rsa |

2017.10.17: Quantum algorithms to find collisions: Analysis of several algorithms for the collision problem, and for the related multi-target preimage problem. #collision #preimage #pqcrypto |

2017.07.23: Fast-key-erasure random-number generators: An effort to clean up several messes simultaneously. #rng #forwardsecrecy #urandom #cascade #hmac #rekeying #proofs |

2017.07.19: Benchmarking post-quantum cryptography: News regarding the SUPERCOP benchmarking system, and more recommendations to NIST. #benchmarking #supercop #nist #pqcrypto |

2016.10.30: Some challenges in post-quantum standardization: My comments to NIST on the first draft of their call for submissions. #standardization #nist #pqcrypto |

2016.06.07: The death of due process: A few notes on technology-fueled normalization of lynch mobs targeting both the accuser and the accused. #ethics #crime #punishment |

2016.05.16: Security fraud in Europe's "Quantum Manifesto": How quantum cryptographers are stealing a quarter of a billion Euros from the European Commission. #qkd #quantumcrypto #quantummanifesto |

2016.03.15: Thomas Jefferson and Apple versus the FBI: Can the government censor how-to books? What if some of the readers are criminals? What if the books can be understood by a computer? An introduction to freedom of speech for software publishers. #censorship #firstamendment #instructions #software #encryption |

2015.11.20: Break a dozen secret keys, get a million more for free: Batch attacks are often much more cost-effective than single-target attacks. #batching #economics #keysizes #aes #ecc #rsa #dh #logjam |

2015.03.14: The death of optimizing compilers: Abstract of my tutorial at ETAPS 2015. #etaps #compilers #cpuevolution #hotspots #optimization #domainspecific #returnofthejedi |

2015.02.18: Follow-You Printing: How Equitrac's marketing department misrepresents and interferes with your work. #equitrac #followyouprinting #dilbert #officespaceprinter |

2014.06.02: The Saber cluster: How we built a cluster capable of computing 3000000000000000000000 multiplications per year for just 50000 EUR. #nvidia #linux #howto |

2014.05.17: Some small suggestions for the Intel instruction set: Low-cost changes to CPU architecture would make cryptography much safer and much faster. #constanttimecommitment #vmul53 #vcarry #pipelinedocumentation |

2014.04.11: NIST's cryptographic standardization process: The first step towards improvement is to admit previous failures. #standardization #nist #des #dsa #dualec #nsa |

2014.03.23: How to design an elliptic-curve signature system: There are many choices of elliptic-curve signature systems. The standard choice, ECDSA, is reasonable if you don't care about simplicity, speed, and security. #signatures #ecc #elgamal #schnorr #ecdsa #eddsa #ed25519 |

2014.02.13: A subfield-logarithm attack against ideal lattices: Computational algebraic number theory tackles lattice-based cryptography. |

2014.02.05: Entropy Attacks! The conventional wisdom says that hash outputs can't be controlled; the conventional wisdom is simply wrong. |