초록 ▼

This invention describes a secure method for consistently reproducing a digital key using a biometric, such as a fingerprint. The digital key is linked to the biometric only through a secure block of data, known as the protected filter. The key cannot be released from the protected filter other than

This invention describes a secure method for consistently reproducing a digital key using a biometric, such as a fingerprint. The digital key is linked to the biometric only through a secure block of data, known as the protected filter. The key cannot be released from the protected filter other than via the interaction with the correct biometric image. Once generated, the digital key may be used in a system as an encryption/decryption key, or as a personal identification number (PIN).

대표청구항 ▼

[ What is claimed is:] [22.]22. A method for secure user verification, comprising:capturing at least one biometric image;obtaining transformed image information comprising transforming said at least one biometric image to a transform domain;obtaining verification magnitude information from said tran

[ What is claimed is:] [22.]22. A method for secure user verification, comprising:capturing at least one biometric image;obtaining transformed image information comprising transforming said at least one biometric image to a transform domain;obtaining verification magnitude information from said transformed image information;retrieving a filter from storage, said filter being a phase-only filter which has no magnitude information;applying at least said verification magnitude information to said phase-only filter to obtain a transitory filter with phase and magnitude information;multiplying said transformed image information with said transitory filter to obtain verification information; andcomparing said verification information with a retrieved reference pattern and, on obtaining a satisfactory match, providing a user verification signal.