This series contains more than one link to the ‘snapshots’ of this website. For some websites, the URL may change periodically. Despite this change to the URL these websites are part of the same record series as they represent the department or organisation’s presence on the web at the time. Occasionally, more than one domain URL to the same website may run in parallel creating an overlap.
CESG (originally Communications-Electronics Security Group) is the branch of GCHQ which works to secure the communications and information systems of the government and critical parts of UK national infrastructure.
In 2016 the National Cyber Security Centre absorbed and replaced the CESG.
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