International standards for biometrics that will apply to the government's controversial identity cards project have been published by the British Standards Institute.
The four BS ISO/IEC 19794 standards cover the recording of fingerprints, iris scans and facial recognition - measurements that are set to be used for ID cards if the project gets the go-ahead from parliament.
The Home Office is already sounding out potential ID card suppliers, issuing a prior information notice earlier this month to test market capacity before any full procurement.
The BSI said the standards were aimed at protecting individuals against ID inaccuracies as well as protecting UK commercial interests in the biometrics industry.
Compliance with the standards will help to ensure that biometric data recorded by one body can be directly compared with measurements produced by another organisation. But the BSI warned that interoperability between different suppliers' biometric products and services would also require testing or other checks.
BS ISO/IEC 19794 will apply to UK passports and ID cards, if established, along with access management systems, ID product and service suppliers, forensic identification and ID issuers.