Identity cards will increase the availability of digitised biometric data. Internet service protocols are vulnerable to error and misuse, potentially giving rise to new control errors e.g. inaccurate transactions and security access, or, errors on a much larger scale.
Evidence from:
House of Commons Science and Technology Committee. July 2006.
“Identity card Technologies: Scientific Advice, Risk and Evidence”
Clearly the risk of matching to someone else is very low, but the risk of failing to prove that you are who you claim to be is quite high. Denial of service claims could become more problematic.
Further detail: