==> HUGE List of Security Blogs (Unix/Linux/Windows) <==
==> all packed with superb information & updated frequently <==
http://blogs.adobe.com/psirt/
http://anti-virus-rants.blogspot.com/
http://asert.arbornetworks.com/
http://blog.avast.com/
http://www.blackbag.nl/
http://www.bunniestudios.com/wordpress/
http://cansecwest.com/
http://carnal0wnage.attackresearch.com/
http://www.cerias.purdue.edu/site/blog
http://cerias.purdue.edu/site/blog/author/spaf
http://blogs.cisco.com/security
http://blog.clamav.net/
http://blog.commandlinekungfu.com/
http://computer.forensikblog.de/en/
http://www.cryptogon.com/
http://www.cryptome.org/
http://www.cutawaysecurity.com/blog/
http://cyb3rcrim3.blogspot.com/
http://garwarner.blogspot.com/
http://cyberspeak.libsyn.com/
http://ddanchev.blogspot.com/
http://darknet.org.uk/
http://darkreading.com/
http://www.thedarkvisitor.com/
http://blog.didierstevens.com/
http://digfor.blogspot.com/
http://edsmiley.com/
http://emergentchaos.com/
http://blog.emsisoft.com/
http://blog.eset.com/
http://fasthorizon.blogspot.com/
http://www.financialcryptography.com/
http://blog.fireeye.com/research
http://www.forensickb.com/
http://fraudwar.blogspot.com/
http://www.f-secure.com/weblog
http://blog.oxff.net/
http://gleeda.blogspot.com/
http://googleonlinesecurity.blogspot.com/
http://www.sophos.com/blogs/gc
http://grandstreamdreams.blogspot.com/
http://www.hackaday.com/
http://ha.ckers.org/blog
http://www.hexblog.com/
http://holisticinfosec.blogspot.com/
http://honeyblog.org/
http://www.h-online.com/security/
http://blogs.iss.net/
http://invisiblethings.org/
http://theinvisiblethings.blogspot.com/
http://jeremiahgrossman.blogspot.com/
http://krebsonsecurity.com/
http://www.l0t3k.org/en/
http://blog.layeredsec.com/
http://www.lightbluetouchpaper.org/
http://blog.trendmicro.com/
http://www.malwaredomainlist.com/
http://chargen.matasano.com/
http://www.avertlabs.com/research/blog/
http://blog.metasploit.com/
http://blogs.technet.com/mmpc/default.aspx
http://securityincite.com/blog/mike-rothman
http://www.milw0rm.com/
http://blog.mandiant.com/
http://www.offensivecomputing.net/
http://www.offensive-security.com/blog/
http://www.openrce.org/articles/
http://www.packetstormsecurity.org/
http://philosecurity.org/
http://praetorianprefect.com/
http://www.prevx.com/blog.asp
http://pseudo-flaw.net/log/
http://www.rationalsurvivability.com/blog/
http://rdist.root.org/
http://blogs.sans.org/
https://blogs.sans.org/computer-forensics/
http://www.schneier.com/blog
http://blog.zoller.lu/
http://www.fas.org/blog/secrecy/
http://www.secsocial.com/blog/
http://secunia.com/advisories/
http://www.securelist.com/en/weblog
http://blogs.securiteam.com/
http://blog.security4all.be/
http://securosis.com/blog
http://www.shmoocon.org/
http://www.shmoo.com/news/
http://blog.snort.org/
http://blog.stopbadware.org/
http://sunbeltblog.blogspot.com/
http://www.symantec.com/business/security_response/weblog/
http://taosecurity.blogspot.com/
http://www.teamfurry.com/wordpress/
http://blogs.technet.com/msrc/
http://blog.threatexpert.com/
http://threatpost.com/
http://blog.tsa.gov/
http://blog.uncommonsensesecurity.com/
http://volatility.tumblr.com/
http://securitylabs.websense.com/
http://windowsir.blogspot.com/
http://www.wired.com/threatlevel/
http://blogs.zdnet.com/security/
http://blog.zynamics.com/
http://www.afcea.org/signal/signalscape/
http://dhs-daily-report.blogspot.com/
https://blog.torproject.org/
http://www.securitywire.com/
http://pauldotcom.com/
http://www.exploit-db.com/
http://www.networkworld.com/topics/security.html
http://www.acunetix.com/blog/
http://www.allspammedup.com/
http://www.gfi.com/blog/
http://www.infosecblog.org/
http://www.techrepublic.com/blog/security
http://www.theemailadmin.com/
http://www.theregister.co.uk/security/
http://seclists.org/
http://www.afcea.org/signal/signalscape/
http://www.woodmann.com/forum/blog.php
http://www.nsa.gov/
http://blogs.technet.com/b/sysinternals/
http://www.securityweek.com/
http://superantispyware.com/blog/
http://www.securitytracker.com/
http://spyblog.org.uk/
http://www.net-security.org/
http://news.cnet.com/security
http://www.fas.org/blog/ssp/
Project/Wiki:
Freedom Box: http://wiki.debian.org/freedombox
http://blogs.pcmag.com/securitywatch/
http://labs.m86security.com/
http://www.irongeek.com/
http://rijmenants.blogspot.com/
Cipher Machines & Cryptology / Intelligence / Security
"Cipher machines & cryptology, history of Signals Intelligence and Communications Security, espionage and intelligence services, from WW2, over the Cold World era, to date."
http://blog.webroot.com/
http://crypto.stanford.edu/
https://ssd.eff.org/
http://publicintelligence.net/
http://www.wikileaks.org/
http://www.itstactical.com/
http://www.forensicswiki.org/
http://p4r4n0id.com/