UK govt launches encryption for public services network

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UK govt launches encryption for public services network

IPsec used.

The British government has formally made available an encrypted communications service for the country's public services network (PSN), after first announcing its development last year.

Called the inter provider encryption domain (IPED), the service provides for protection of confidential materials traversing the PSN at the "restricted" impact level 3 (ILE3) classification.

Until now, the PSN has only been able to offer security at the lower impact level 2 "protect" classification. UK government departments operate a six-level security classification system, with the lowest "unclassified".

Beyond ILE3, there are ILE4, ILE5 and ILE6, classified as "confidential", "secret" and "top secret" respectively.

The PSN specification [PDF] stipulates that shared layer encryption through IPsec should be used in preference to encrypting upper network layers, so as to provide generic protection and to avoid incompatibilities between applications.

Transport layer security (TLS) is also used for websites and secure voice communications in the PSN.

UK telcos BT and Vodafone are the first two certified suppliers of IL3 PSN services.

The PSN is modelled on the internet and is IP-based following the same open standards, with the aim being to enable the secure sharing of services and communications while ensuring a consistent level of information assurance.

It replaces the older government secure intranet/government secure extranet infrastructure. Some 588 public sector organisations are currently moving over to the PSN.

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