Informations about SSL certificates and networks security
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We’ve long known that 64 bits is too small for a block cipher these days. That’s why new block ciphers like AES have 128-bit, or larger, block sizes. The insecurity of the smaller block is nicely illustrated by a new attack called “Sweet32.” It exploits the ability to find block collisions in Internet protocols to … Read More “Collision Attacks Against 64-Bit Block Ciphers” »
New paper: “Surreptitiously Weakening Cryptographic Systems,” by Bruce Schneier, Matthew Fredrikson, Tadayoshi Kohno, and Thomas Ristenpart. Abstract: Revelations over the past couple of years highlight the importance of understanding malicious and surreptitious weakening of cryptographic systems. We provide an overview of this domain, using a number of historical examples to drive development of a weaknesses … Read More “"Surreptitiously Weakening Cryptographic Systems"” »
I missed this paper when it was first published in 2012: “Neuroscience Meets Cryptography: Designing Crypto Primitives Secure Against Rubber Hose Attacks” Abstract: Cryptographic systems often rely on the secrecy of cryptographic keys given to users. Many schemes, however, cannot resist coercion attacks where the user is forcibly asked by an attacker to reveal the … Read More “Subconscious Keys” »
Here’s an IDEA-variant with a 128-bit block length. While I think it’s a great idea to bring IDEA up to a modern block length, the paper has none of the cryptanalysis behind it that IDEA had. If nothing else, I would have expected more than eight rounds. If anyone wants to practice differential and linear … Read More “The IDEA Encryption Algorithm with a 128-bit Block Length” »
Appelbaum, Poitras, and others have another NSA article with an enormous Snowden document dump on Der Spiegel, giving details on a variety of offensive NSA cyberoperations to infiltrate and exploit networks around the world. There’s a lot here: 199 pages. (Here they are in one compressed archive.) Paired with the 666 pages released in conjunction … Read More “New NSA Documents on Offensive Cyberoperations” »
This talk (and paper) describe a lattice-based public-key algorithm called Soliloquy developed by GCHQ, and a quantum-computer attack on it. News article. Powered by WPeMatico
Jim Sanborn has given the world another clue to the fourth cyphertext in his Kryptos sculpture at the CIA headquarters. Older posts on Kryptos. Powered by WPeMatico
The NSA recently declassified a report on the Eurocrypt ’92 conference. Honestly, I share some of the writer’s opinions on the more theoretical stuff. I know it’s important, but it’s not something I care all that much about. Powered by WPeMatico