SDC Practice in the Secure Access of the UK Data Service Reza AfkhamiUK Data Archive / UK Data Service
Joint UNECE/Eurostat work session on statistical data confidentiality-Ottawa, 2013
Agenda
• UK Data Service - overview
• Safety nets in User Journey
• Secure Access training
• Output checking Procedures
• Challenges
• Questions?
Introducing UK Data Service• Integration of
• the Economic and Social Data Service (ESDS), • the Census Programme, • the Secure Data Service (SDS), • Survey Question Bank,• Other elements of the ESRC data service infrastructure
• Partnership includes the universities of:• Essex, Southampton, Manchester, Edinburgh, Leeds, UCL
• What does it offer?• A single point of access to all data resources• Download facility • Different access modalities• Collaboration with depositors/data owners • Advice, training and on-line materials• Data hosting and preservation services
UK Data Service
http://www.ukdataservice.ac.uk
The User Journey
Training
• Required for access• Face-to-face, small groups• E-Training due Spring 2013• 3 components:
• Using the SDS
• Safety and Responsibility
• Statistical Disclosure Control
Output checking Issues
• ESSnet Standards• Analytical outputs vs secondary datasets• Final vs Intermediate outputs• Manual checking• Cross-checking • Record keeping of all released outputs• Format vs Content in rejection rate• Context dependant output checking• Secondary disclosure in data structure• Transformation of unsafe outputs to safe
Context: when are data public?
Would this map be released if it showed
• bookshops on the ONS business register?
• majority non-white neighbourhoods?
• animal research laboratories on the business register?
• Some times we don’t know:• case-by-case basis
Hierarchical Data: secondary disclosureSIC Code Name Companies Turnover141 Motor vehicles 46 11,359
142 Other transport 97 2,171
1411 Cars & light vans 18 5,526
1412 Heavy goods vehicles 15 3,612
1413 Public service vehicles -- --
1414 Other motor vehicles 11 798
1421 Bicycles 14 634
1422 Sailing craft 65 1,205
1423 Other non-motor transport 18 332
2 bus companies with a turnover of 1,423
Challenges
• Joint collaboration with researcher• Hard and fast rules vs flexibility• Unpredictable results via complex techniques• How to get efficiency, transparency, security and
consistency?
Questions?
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