Loading

Factoring 2048-bit Numbers Using 20 Million Qubits

This theoretical paper shows how to factor 2048-bit RSA moduli with a 20-million qubit quantum computer in eight hours. It's interesting work, but I don't want overstate the risk. We know from Shor's Algorithm that…

More Cryptanalysis of Solitaire

In 1999, I invented the Solitaire encryption algorithm, designed to manually encrypt data using a deck of cards. It was written into the plot of Neal Stephenson's novel Cryptonomicon, and I even wrote an afterward…

The Doghouse: Crown Sterling

A decade ago, the Doghouse was a regular feature in both my email newsletter Crypto-Gram and my blog. In it, I would call out particularly egregious -- and amusing -- examples of cryptographic "snake oil."…

Loading

John Paul Stevens Was a Cryptographer

I didn't know that Supreme Court Justice John Paul Stevens "was also a cryptographer for the Navy during World War II." He was a proponent of individual privacy.Read more: schneier.com

Google Releases Basic Homomorphic Encryption Tool

Google has released an open-source cryptographic tool: Private Join and Compute. From a Wired article: Private Join and Compute uses a 1970s methodology known as "commutative encryption" to allow data in the data sets to…