Social Media

BrianHonan – @BrianHonan

https://twitter.com/brianhonan
Twitter profile: InfoSec Consultant, Blogger, Author, Founder & Head of Ireland's CSIRT @irisscert, and Special Advisor on Internet Security to Europol.
Follow for: Security news and views

Briankrebs – @briankrebs

https://twitter.com/briankrebs
Twitter profile: Independent investigative journalist. Writes about cybercrime. Author of 'Spam Nation', a NYT bestseller. Wrote for The Washington Post '95-'09 Follow for: In-depth Security news and investigation

Tripwire, Inc. – @TripwireInc

https://twitter.com/TripwireInc
Twitter profile: The leading provider of advanced threat, security and compliance solutions to confidently detect, prevent and respond to cybersecurity threats
Follow for: News. Trends. Insights.

CREST – @CRESTadvocate

https://twitter.com/crestadvocate
Twitter profile: CREST is the not for profit professional body representing the ethical security testing & cyber incident response industry
Follow for: Industry news and events

Davey Winder - @happygeek

https://twitter.com/happygeek
Twitter profile: Editorial Fellow Dennis Publishing, award winning journalist, animal rights supporter, vegan, collector of tattoos. File me under different
Follow for: Insight into latest security vulnerability news

The Register – @TheRegister

https://twitter.com/theregister
Twitter profile: Biting the hand that feeds IT. Technology and science news for world+dog. 
Follow us: Science and technology news for the world

LinkedIn

Information Security Community

Join the Information Security Community on LinkedIn - the largest community of infosec professionals in the industry. Let's build a network that connects people, opportunities, and ideas. If you are involved in purchasing, selling, designing, deploying... or using information security solutions - this group is for you. Covered topics include compliance, encryption, anti-virus, malware, cloud security, data protection, hacking, network security, virtualization, and more.

Type: Professional Group
Members: 250,525
https://www.linkedin.com/groups?home=&gid=38412

SANS Institute - EMEA Region

A group for those who have attended or are considering attending one of The SANS Institute's world class training conferences in EMEA.

Type: Networking Group
Members: 43
https://www.linkedin.com/groups?home=&gid=4624185

Technology journalists and PRs

Technology journalism and PR community - created by @AndyLim. Manned by @DWPub 
For more information visit us at http://TechJPR.com

Type: Networking Group
Members: 2,970
https://www.linkedin.com/groups?home=&gid=1940827

Infosecurity Europe Professionals

Members of this are interested in all facets of Information security from Data Leakage Prevention, Global Corporate Challenges, Online Security and Threats & Mitigation. 
This group will encourage an active discussion/news forum as well as a blog that is supported by Europe's Largest Security Event, www.infosec.co.uk. For more information about the group, contact us on infosecurityteam@reedexpo.co.uk and we will be happy to answer all your questions.

Type: Networking Group
Members: 2,132
https://www.linkedin.com/groups?home=&gid=3305097

Security Wonks

https://www.linkedin.com/groups/6807544/profile

Security Wonks is a news and knowledge exchange resource powered by the infosec community. Security and IT professionals are invited to share their insights and expertise, as well as news on trending security issues.

Type: Professional Group
Members: 1,628

InfoSec Careers (Information Security)

https://www.linkedin.com/groups/1364287/profile

InfoSec Careers is dedicated to connecting Information Security and Cyber professionals interested in a new permanent career opportunity or contracting jobs with specialist recruiters and hiring managers looking for new talent. This is THE LinkedIn Group for Cyber & Information Security Jobs and all those interested in IT Security news from industry.

This group is specifically relevant for those professionals holding CISM, CISA, CREST, BS7799 / ISO27001 Lead Auditor, CISSP, GIAC, PCI QSA, CRISC, CLAS or similar certifications.

Type: Networking Group
Members: 9,120 

SC Magazine UK (Information Security)

https://www.linkedin.com/groups/1833658/profile

This group is open to professionals working in information security and risk management and is affiliated to SC Magazine and SC branded events including conferences. The SC brand provides information and intelligence for professionals working in information and organisational security.

Its followers include FTSE 100 CISOs and CSOs who are relied upon to protect their businesses from the wide-ranging data threats that exist in the world today.

Type: Networking Group
Members: 6,334

CISO Security Information Group (CSIG) - Information Security for Managers

https://www.linkedin.com/groups/CISO-Security-Information-Group-CSIG-107434?gid=107434&trk

CISO Security Information Group's main objective is to build a large global network of professionals with knowledge and experience in information security, to share information receiving and giving help to the whole community of people interested in information security. 

Welcome to the CISO Security Information Group. Exchanging information in real-world of information security.  

Type: Corporate Group


Cyber Security Challenge UK

https://www.linkedin.com/groups?home=&gid=3606959

The Cyber Security Challenge UK is a programme of national challenges, designed by experts, to identify and nurture the UK’s future cyber security workforce. It has been established by industry leaders to improve the quality and quantity of talented people entering the cyber security profession. It will test the nation’s cyber skills, inspire entrants to develop their talents, and provide clear pathways to careers. 

A 2009 SANS Institute survey found that 90% of companies had experienced trouble recruiting new cyber security staff and nearly 60% expected to be employing more cyber security staff in the next five years. The Challenge will reward the best talent with career enabling prizes that will link them with the courses and training they need to develop and put them in touch with an industry actively seeking new skilled recruits. It marks the first time that industry, government and the education sector have come together to tackle what is an increasingly important issue for for our country’s digital economy, chosen way of living and national security. 

The Challenge is a not for profit business, shaped by a consortium of cyber security leaders, who, through their involvement and sponsorship, are helping to strengthen our workforce and protect the UK in the face of an increasing threat. Using their own knowledge of the skills and capabilities needed to tackle the increasing cyber threat, sponsors are demonstrating their position and leadership in cyber security.

Type: Nonprofit Group

SANS Digital Forensics and Incident Response

SANS provides computer forensics training via live classroom training events and online.

The SANS Digital Forensics and Incident Response community offers digital forensics and incident response professionals an opportunity to learn, discuss, and share current developments in the field. It also provides information regarding digital forensics and incident response training, certification, and events.

https://www.facebook.com/sansforensics

Blog

TAO Security

http://www.taosecurity.com/
Since 1998 Richard Bejtlich has defended Western interests from advanced digital intruders. Mr. Bejtlich promotes Network Security Monitoring solutions to help global organizations stay in business by detecting and responding to digital threats.

Naked Security

https://nakedsecurity.sophos.com/
Award-winning computer security news from Sophos

Security Bistro

http://ddosprotectionblog.corero.com/blog/
IT network security and DDoS security news. Email security, cyber security, spear-phising

Security Bloggers Network

http://www.securitybloggersnetwork.com/security-bloggers-network-the-feed/ 
The Security Bloggers Network is the largest collection of information security focused blogs and podcasts in the world. Of the almost 300 different blogs and podcasts included, each one has requested to be included in the aggregated feed.

Schneier on Security

https://www.schneier.com/
Bruce Schneier is an internationally renowned security technologist, called a "security guru" by The Economist. He is the author of 12 books -- including Liars and Outliers: Enabling the Trust Society Needs to Thrive -- as well as hundreds of articles, essays, and academic papers. His influential newsletter "Crypto-Gram" and his blog "Schneier on Security" are read by over 250,000 people.

Graham Cluley

https://grahamcluley.com/
Graham Cluley, public speaker and independent computer security analyst. He is an independent blogger and talks to the media about computer security issues, speaks at company events and conferences. He has given talks around the world at events such as RSA, Infosec, Web Summit, EICAR, AVAR, ICSA, ISSA, Virus Bulletin, Ja.net, Campus Party and the European Internet Security Forum.

ConCon Blog

http://www.contextis.co.uk/resources/blog/
Contains news and detailed analysis of research projects and recently discovered security vulnerabilities from Context Information Security.

SANS Digital Forensics and Incident Response Blog

http://digital-forensics.sans.org/blog
The SANS Digital Forensics and Incident Response community offers digital forensics and incident response professionals an opportunity to learn, discuss, and share current developments in the field. It also provides information regarding digital forensics and incident response training, certification, and events.

Krebs on Security

http://krebsonsecurity.com/
In-depth Security news and investigation