Category: cryptography

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Side-Channel Attack against CRYSTALS-Kyber

Posted on By infossl
academic papers, cryptography, encryption, machine learning, quantum computing, quantum cryptography, Security technology, side-channel attacks, Uncategorized

CRYSTALS-Kyber is one of the public-key algorithms currently recommended by NIST as part of its post-quantum cryptography standardization process. Researchers have just published a side-channel attack—using power consumption—against an implementation of the algorithm that was supposed to be resistant against that sort of attack. The algorithm is not “broken” or “cracked”—despite headlines to the contrary—this … Read More “Side-Channel Attack against CRYSTALS-Kyber” »

Mary Queen of Scots Letters Decrypted

Posted on By infossl
cryptography, encryption, history of cryptography, Security technology, Uncategorized

This is a neat piece of historical research. The team of computer scientist George Lasry, pianist Norbert Biermann and astrophysicist Satoshi Tomokiyo—all keen cryptographers—initially thought the batch of encoded documents related to Italy, because that was how they were filed at the Bibliothèque Nationale de France. However, they quickly realised the letters were in French. … Read More “Mary Queen of Scots Letters Decrypted” »

Attacking Machine Learning Systems

Posted on By infossl
cryptography, cyberattack, cybersecurity, essays, machine learning, Security technology, Uncategorized, vulnerabilities

The field of machine learning (ML) security—and corresponding adversarial ML—is rapidly advancing as researchers develop sophisticated techniques to perturb, disrupt, or steal the ML model or data. It’s a heady time; because we know so little about the security of these systems, there are many opportunities for new researchers to publish in this field. In … Read More “Attacking Machine Learning Systems” »

Breaking RSA with a Quantum Computer

Posted on By infossl
academic papers, china, cryptanalysis, cryptography, quantum computing, rsa, Security technology, Uncategorized

A group of Chinese researchers have just published a paper claiming that they can—although they have not yet done so—break 2048-bit RSA. This is something to take seriously. It might not be correct, but it’s not obviously wrong. We have long known from Shor’s algorithm that factoring with a quantum computer is easy. But it … Read More “Breaking RSA with a Quantum Computer” »

A Taxonomy of Access Control

Posted on By infossl
cryptocurrency, cryptography, keys, Security technology, taxonomies, Uncategorized

My personal definition of a brilliant idea is one that is immediately obvious once it’s explained, but no one has thought of it before. I can’t believe that no one has described this taxonomy of access control before Ittay Eyal laid it out in this paper. The paper is about cryptocurrency wallet design, but the … Read More “A Taxonomy of Access Control” »

NIST’s Post-Quantum Cryptography Standards

Posted on By infossl
algorithms, cryptanalysis, cryptography, nist, quantum computing, quantum cryptography, Security technology, Uncategorized

Quantum computing is a completely new paradigm for computers. A quantum computer uses quantum properties such as superposition, which allows a qubit (a quantum bit) to be neither 0 nor 1, but something much more complicated. In theory, such a computer can solve problems too complex for conventional computers. Current quantum computers are still toy … Read More “NIST’s Post-Quantum Cryptography Standards” »

SIKE Broken

Posted on By infossl
algorithms, cryptanalysis, cryptography, encryption, nist, quantum computing, Security technology, Uncategorized

SIKE is one of the new algorithms that NIST recently added to the post-quantum cryptography competition. It was just broken, really badly. We present an efficient key recovery attack on the Supersingular Isogeny Diffie­-Hellman protocol (SIDH), based on a “glue-and-split” theorem due to Kani. Our attack exploits the existence of a small non-scalar endomorphism on … Read More “SIKE Broken” »

NIST Announces First Four Quantum-Resistant Cryptographic Algorithms

Posted on By infossl
cryptography, encryption, nist, quantum computing, Security technology, Uncategorized

NIST’s post-quantum computing cryptography standard process is entering its final phases. It announced the first four algorithms: For general encryption, used when we access secure websites, NIST has selected the CRYSTALS-Kyber algorithm. Among its advantages are comparatively small encryption keys that two parties can exchange easily, as well as its speed of operation. For digital … Read More “NIST Announces First Four Quantum-Resistant Cryptographic Algorithms” »

On the Subversion of NIST by the NSA

Posted on By infossl
academic papers, algorithms, cryptography, nist, nsa, Security technology, Uncategorized

Nadiya Kostyuk and Susan Landau wrote an interesting paper: “Dueling Over DUAL_EC_DRBG: The Consequences of Corrupting a Cryptographic Standardization Process“: Abstract: In recent decades, the U.S. National Institute of Standards and Technology (NIST), which develops cryptographic standards for non-national security agencies of the U.S. government, has emerged as the de facto international source for cryptographic … Read More “On the Subversion of NIST by the NSA” »

Hertzbleed: A New Side-Channel Attack

Posted on By infossl
cryptography, keys, Security technology, side-channel attacks, Uncategorized

Hertzbleed is a new side-channel attack that works against a variety of microprocressors. Deducing cryptographic keys by analyzing power consumption has long been an attack, but it’s not generally viable because measuring power consumption is often hard. This new attack measures power consumption by measuring time, making it easier to exploit. The team discovered that … Read More “Hertzbleed: A New Side-Channel Attack” »