Some interesting Information Security magazines.
A great information security related magazine. It was free for a period of time, but has now become paid.
It is a new magazine soon to be released that seems to be very promising & you must follow it closely
4) HITB – Hack In The Box
Its aim is to to provide the security community with beneficial technical material.
Some sites where you can test you skills; may it be in ethical hacking, cryptanalysis etc.
At MysteryTwister C3 you can solve crypto challenges, starting from the simple Caesar cipher all the way to modern AES, they have challenges for everyone.