Security + Anti Virus
Spam Watch
Suspect Twitter spam? Let us know (http://bit.ly/Tweport)! Follow @spam & @safety for helpful info, and check out our favorite tips: http://bit.ly/spamfav935,945 followers | Follow
Microsoft Security
We cover security and privacy efforts for Microsoft - from the inside.39,965 followers | Follow
TrendMicro
Trend Micro Incorporated, a trusted global cloud security leader, creates a world safe for businesses and consumers exchanging digital information.39,151 followers | Follow
Eugene Kaspersky
Chairman and CEO of Kaspersky Lab. Waging war against malware for 23 years. #Infosec, #cybercrime, #cyberwar. Scuderia Ferrari F1 fan. Tweets are my own.38,716 followers | Follow
Kaspersky Lab
Leading developer of Internet threat management solutions that protect against all forms of malicious software.38,589 followers | Follow
Bitdefender
Award-winning antivirus protection software. We beat all viruses and anti-viruses. We are always AWAKE! Get Protection NOW: http://bit.ly/BitdefenderSphere35,356 followers | Follow
Mikko Hypponen
CRO at F-Secure. Malware Adventurer. World Champion in Xevious.29,659 followers | Follow
briankrebs
computer, internet security journalist, writes about cyber crime. wrote for The Washington Post '95-'0919,275 followers | Follow
Schneier Blog
Bruce Schneier is an internationally renowned security technologist and author. Described by The Economist as a "security guru"17,910 followers | Follow
Graham Cluley
Naked Security chap at Sophos. Viruses, spam, computer security, that kind of stuff. Named 'Twitter user of the year' by Computer Weekly in 2009 and 2010.17,339 followers | Follow
Threatpost
Threatpost is the first stop for fast-breaking security news, conversations and analysis from around the world.17,177 followers | Follow
SCMagazine
The official Twitter feed for all things IT security. Like us on facebook.com/SCMag16,467 followers | Follow
Security Twits
A place to find information security folks. For retweets, @ or DM me or tag posts with #infosecjobs for infosec jobs, #infosecq for questions, and #infoseccfp.15,607 followers | Follow
SANS Institute
SANS is the most trusted and by far the largest source for IT, information security training, certification and research in the world.14,655 followers | Follow
Panda Security
Official Twitter from Panda Security. One of the world's leading creators and developers of technologies, products and services for keeping clients malware free13,757 followers | Follow
Infosecurity
Infosecurity is the only magazine dedicated to the strategy and technique of information security, delivering critical business and technical information for IT13,480 followers | Follow
Mark Russinovich
Technical Fellow at Microsoft in Windows Azure, author of Zero Day: A Novel, Windows Internals, Sysinternals Admin Reference and the Sysinternals utilities.12,702 followers | Follow
SophosLabs
The global network of highly skilled researchers and analysts, protecting businesses from known and emerging malware - viruses, rootkits and spyware.12,460 followers | Follow
Team Cymru
Specialized Internet security research firm and 501(c)3 non-profit dedicated to making the Internet more secure.10,740 followers | Follow
Jart Armin
I walk around feeling a sort of existential guilt all the time; and honestly for me the internet is a way of feeling less guilty about the universe10,431 followers | Follow
Web Security News
Web Security News is a digest of important security announcements and events about web application security techniques and strategies.10,135 followers | Follow
McAfee News
Get McAfee's official news announcements by following this feed. (Not an interactive feed.)9,752 followers | Follow
Virus Bulletin
Monthly magazine; bi-monthly anti-malware and anti-spam tests; annual conference; resourceful website; nice people.9,514 followers | Follow
Chris Wysopal
Application security, former L0pht researcher, L0phtCrack and Netcat for Windows developer, Veracode CTO & co-founder8,143 followers | Follow
Leigh Honeywell
Infosponge, hyper-generalist, geek feminist, Canuck expat. Pwnie herder with @msftsecresponse. Tweets are my opinions only, RTs != endorsements.5,574 followers | Follow
Chester W - Sophos
Sophos Security expert Chet Wisniewski shares advice and insights into online threats4,783 followers | Follow
F-Secure Labs
Follow F-Secure's Chief Research Officer Mikko Hypponen @mikko and Security Advisor Sean Sullivan @FSLabsAdvisor for computer security related tweets…4,495 followers | Follow
CA Security
News and insights on Security and Identity and Access Management from CA Technologies.4,187 followers | Follow
MalwareNews
MalwareNews is sponsored by SkyRecon, a provider of IT security for endpoints, applications, data and users. Sean Martin, CISSP3,570 followers | Follow
BitDefenderLabs
IT Security news, info, and tons of other malware and antivirus goodies.3,490 followers | Follow
Symantec.cloud
The Official Symantec.cloud Tweets including MessageLabs intelligence - contacts: http://tinyurl.com/mlprc3,485 followers | Follow
SymantecUK
Symantec updates you and interacts with you on all things security, storage, and data protection in the United Kingdom.3,325 followers | Follow
FishNet Security
FishNet Security, an information security solutions provider, helps organizations to manage risks, maintain compliance, & maximize operational efficiency.3,088 followers | Follow
Paul Ducklin
Computer scientist who's passionate about security. Head of Technology, Asia Pacific at Sophos in Sydney. First CPU purchased with own money: 6502.3,070 followers | Follow
Andrew Moloney
Corporate tech. marketing exile, now running my own consulting business. Projects in #infosec, tech. as well as SW food & drink, via my alter ego @ArtisanSW2,750 followers | Follow
Rik Ferguson
Director Security Research @ Trend Micro - I tweet as myself, expect some non security stuff too.2,684 followers | Follow
Sean Sullivan
Security Advisor @ F-Secure Corporation ~ Political scientist, geographer, technician, researcher, blogger. I want to be a behavioral economist in my next life…1,809 followers | Follow
Windows Update
1,773 followers | Follow
Get Safe Online
Online Safety Campaign from the UK, sponsored by Government and the Private Sector1,603 followers | Follow
F-Secure UK
Here to help you stay safe online. Try our Internet Security and Online Backup for free.1,491 followers | Follow
M86 Security
M86 delivers appliance-, software- and cloud-based Web and email security solutions. We're now part of @Trustwave.1,180 followers | Follow
cchristiansen
VP of IDC's Security Products & Services. Coverage includes messaging, web, network, endpoint, vulnerability, identity, & access management.1,108 followers | Follow
Acronis_UK
Acronis, offering data backup & disaster recovery insights. Look out for our global report Feb 1 #DRI #Acronis714 followers | Follow
KasperskyUK
Leading developer of Internet threat management solutions that protect against all forms of malicious software.670 followers | Follow
Rob Rosenberger
Co-founder of the critically acclaimed Vmyths.com, which debunks computer security hysteria669 followers | Follow
Securityblog
636 followers | Follow
BitDefender News
625 followers | Follow
The avast! Team
The No. 1 antivirus in the world, with free and paid-for solutions for everyone!555 followers | Follow
Search Security UK
493 followers | Follow
kurt wismer
436 followers | Follow
Sophos Data Protect
Data Protection Company (Utimaco Safeware is now a part of Sophos)354 followers | Follow
Kensington ClickSafe
Official Twitter for Kensington ClickSafe™ - the simplest, safest & smartest investment for your company's laptop security.348 followers | Follow
Insite Security
Insite Security is a full-service security agency that addresses the security needs and protection of corporations and high-net-worth individuals.273 followers | Follow
Andrew Clarke
Identity & Access Management (IAM)/Security Strategic Business Alliances & Partnerships, EMEA at Quest Software www.quest.com245 followers | Follow
Lolita Baldor
National Security/Pentagon Reporter Associated Press Washington, D.C.188 followers | Follow
Dan Kaminsky
161 followers | Follow
