Social Media

The Register – @TheRegister

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

CREST for Recruiters

https://www.linkedin.com/grp/home?gid=4563897

The CREST for Recruiters group is for professionals in the penetration testing and network forensic industries, and for those wishing to recruit them. It is also a forum for discussion about recruitment issues in the cyber security industry in general.

Type: Professional Group

Institute of Information Security Professionals (IISP)

The global professional Institute for those working in the Information Security/Information Assurance field. Affiliate, Associate and Full membership available to individuals and supporting membership available to corporations, LinkedIn Group is now open to security consultants and practitioners interested in IISP not just members.

This is intended to be a group for practitioners so recruitment consultants and other interested parties such as product sales executives may not be eligible to be linked to this group unless they are members of the Institute.
None of the views expressed here necessarily reflect the views of the Institute and are the individual's own.

Type: Professional Group
Members: 2,360
https://www.linkedin.com/groups?gid=124975&trk 

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

Blog

Krebs on Security

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

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.