ClubHACK Magazine Issue 28 – Topics covered include Steganography over covert channels, Kautilya, HTTPS, and more.
You can download it from the following link: https://packetstormsecurity.com/files/download/112946/clubhack-magazine-may2012.pdf
Source: https://packetstormsecurity.com/files/112946/ClubHACK-Magazine-Issue-28.html