Using GSi to email Protectively Marked Information
A GSi email account can be used to join you and your organisation with many other areas of the UK public sector. The PSI (Public Sector Interconnect) can be used as a bridge to enable secure communications between these communities up to the RESTRICTED security level. There are around 440,000 email users on the GSi, 150,000 on the Police National Network and 1.2 million on the NHS network, so the PSI can make a significant difference to the way you communicate with the rest of the public sector.
Correctly addressed emails between the following communities will always pass securely over the PSI (not the internet) from your GSi email account.
Impact Level 3 (RESTRICTED) Domains
The following domains are suitable for exchange of information up to and including confidentiality Impact Level 3 (RESTRICTED).
GSi Public sector organisations connected to the GSI community within the GSi (gsi.gov.uk)
CJX* The Police National Network or Criminal Justice Exchange (.police.uk or .pnn.police.uk)
GSE Private sector organisations connected to the GSi who meet the required security standards (.gse.gov.uk)
Impact Level 2 (PROTECT) Domains
The following domains are suitable for exchange of information up to and including confidentiality Impact Level 2 (PROTECT) and the occasional exchange of information at Impact Level 3 (RESTRICTED)
Local domains connected to the core network may not have been accredited to transmit/store/process RESTRICTED information, and so users within these domains will not necessarily have clearance and access approval. A risk management decision to release RESTRICTED information to these domains must be made by the appropriate party.
Local authorities connected to either the GCSX or GSX are not formally accredited to RESTRICTED. However they will meet the requirements of the Code of Connection, and the local authority network and supporting management procedures will be deemed suitable for the reception of occasional RESTRICTED information.
GSX Public sector organisations connected to the GSX community within the GSi (.gsx.gov.uk)
GCSX English and Welsh local authorities connected to the GCSX community through the Government Connect Programme (.gcsx.gov.uk)
NHS* The National Heath Service network (.nhs.net)
SCN* Private sector organisations connected to the Police National Network (scn.gov.uk)
CJSM* The Criminal Justice Secure eMail service provided by CJIT (cjsm.net)
Other domains with a connection to the PSI
The following domains do not have accreditation or formal trust recognised by HMG. Organisations must recognise and accept any risks associated with the transfer of sensitive information to these domains. We can confirm that information sent will go directly to the peer network via the Public Sector Interconnect rather than via the Internet.
TESTA* The European communication platform (eu-admin.net)
GSS - The predecessor of the GSE used by private sector organisations (gssiup.co.uk)
Impact Level 4 (CONFIDENTIAL) Domains
The following domain can be used to exchange confidentiality Impact Level 4 (CONFIDENTIAL) information with other members of the same community.
xGSI - Public sector organisations connected to the xGSI community within the GSi (xgsi.gov.uk)
The PSI is not suitable for exchanging information at confidentiality Impact Level 4 (CONFIDENTIAL), Impact Level 5 (SECRET) or Impact Level 6 (TOP SECRET.)
If you are not sure about the impact level of the loss of the information you are sharing, the CESG document Business Impact Table' (only available to existing GSi customers) or the Manual of Protective Security will provide guidance. Alternatively email the GSi team.
*Please note: Buying Solutions is not responsible for the content or reliability of these external web sites