John Q Random writes "Stefan Brands's company credentica.com announced their U-Prove library and SDK implementing ID tokens — also known as digital credentials or private credentials. (Private Credentials are a cool PKI replacement and anonymous e-cash tech that allows you to prove certified attributes like age, credit rating, group membership, etc. without revealing who you are; to allow you to have a digital life without the digital dossier effect inherent in a central databases.) Following this announcement, Adam Back announced credlib, an open source implementation of Brands credentials (and the older more basic Chaum certificates). These developments relate to recent news from IBM's Zurich labs on their identity-mixer project (previously discussed on Slashdot) that is based on the less efficient Jan Camenisch and Anna Lysyanskaya credentials."

Scientific American has an article on Gordon Bell's 9-year-long experiment of recording great swaths of his life on digital media. The idea harks back to an article by Vannevar Bush in the 1940s, which arguably presaged hypertext and the Web as well. Bell, the father of the VAX computer and now with Microsoft Research, first published a paper on his experiment in CACM in 2001. The goal is to record "all of Bell's communications with other people and machines, as well as the images he sees, the sounds he hears and the Web sites he visits." Storage requirements are estimated at a modest 18 GB a year, 1.1 TB over a 60-year span. Not a lot if the article's projection comes to pass — that we will all be walking around with 1 TB of storage in our portable devices by 2015. The article is co-authored by Jim Gemmell, who wrote the software for the MyLifeBits project.