Social Media

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

Naked Security – @NakedSecurity

https://twitter.com/NakedSecurity
Twitter profile: Award-winning security news, opinion, advice and research from Sophos
Follow for: Security Industry news and views

Troy Hunt - @troyhunt

https://twitter.com/troyhunt
Twitter profile: Microsoft MVP for Developer Security, Pluralsight author and international speaker, you’ll usually find me talking about web security and “The Cloud”.
Follow for:  Security news and views

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

Google Online Security Blog

http://googleonlinesecurity.blogspot.co.uk/
News and updates from Google

Naked Security

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

Krebs on Security

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

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.

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.

SecurityWatch

http://bhconsulting.ie/securitywatch/
Brian is recognised internationally as an expert in the field of information security and has worked with numerous companies in the private sector and with government departments, in Ireland, Europe and throughout the United Kingdom. Brian has also provided advice to the European Commission on matters relating to information security. He is also on the advisory board for a number of innovative information security companies.

Roger’s Information Security Blog

http://www.infosecblog.org/
In a previous life I was security administrator responsible for the day to day computer security at a mid-sized beltway bandit.   In that role I would recommend, evaluate, select and implement security solutions.   This included things like PKI, Desktop Encryption, EFS, Desktop Endpoint Protection, DLP, IDS, Firewall, vulnerability scanning, patch management, FISMA, and NAC.