Wednesday, 15 July 2015

The Vaudenay Attack : A practical example

Hi guys in the previous post I discussed the theoretical basis for the vaudenay (or padding oracle attack) , in this one I'm going to share a little script that will help you play around with padding oracles and also manually perform the attack. But first a quick recap!

Sunday, 12 July 2015

Padding Oracle Attacks : The other padding that killed your secret key

The Oracle of Delphi
Hi folks! In this post I'd like to talk about something that's pretty old but still crops up every now and then (example). I know for most folks this is nothing new but I'd still like to have a post about this attack in my archive and also deliver a good explanation of the attack in a way that makes it easier for more people to understand (I know for new comers this attack can be a bit of a mind bending exercise :P). Also if you want to be a total infosec / crypto hipster you can refuse to call it padding oracle attacks and call it by its eponym "the Vaudenay attack" and pay homage to the inventor Serge Vaudenay :)

Update: The next post is a more practical explanation of this attack :)