There are many magazines, e-mag, e-zine - you name it that could help you - or kill your boredom during your spare time. Well - what if you're in security domain and need one to flourish your knowledge?
I would suggest the following:
- Virus Bulletin, electronic version only, montly http://www.virusbtn.com/ . The appropriate readers would be industrial and academic security researchers.
- IEEE Security & Privacy, printed and online version, periodically, IEEE S & P . Academic researcher would fit this better.
The rest, for example Phrack underground magazine is Free of Charge.