Security update: change to HMAC

Posted on November 2009

We’ve received some suggestions via the comments on this blog and also from comments on Bruce Schneier’s blog to improve the security of norbt.

We have changed from Hashing to MAC‘ing. We have updated the security page to reflect the current implementation of norbt. You can find the previous content at security0.

A strong norbt starts with a strong answer.  Remember to think about how easy it is for a person or a computer to guess your answer in order to determine how easy/difficult your norbt is.


AES stick figure guide by Morserware

Posted on October 2009

aes-cartoonWhen you use norbt.com, AES (Advanced Encryption Standard) is being executed in your browser.

If you wonder what’s AES and how it works you can read an excellent post at Moserware: A Stick Figure Guide to the Advanced Encryption Standard (AES)

It is a fun read, the cartoon has 4 different acts:

Act1: once upon a time
Act2: crypto basics
Act3: details
Act4: maths!

We highly recommend reading 1 and 2 (or 2 and 1).