Finger vein fusion fuzzy vault realization method

Abstract

The invention discloses a finger vein fusion fuzzy vault realization method. The finger vein fusion fuzzy vault realization method comprises following steps: step 1, finger vein skeleton information of an image of a finger vein A and finger vein skeleton information of an image of a finger vein B are fused to acquire a vein skeleton image C, and characteristic points are extracted to acquire a characteristic information set, and the characteristic information set is extracted; step 2, by adopting a locking algorithm, a cipher key required to be protected is bound up with the characteristic information set of the step 1, and then a finger vein fusion fuzzy vault is generated; step 3, finger vein skeleton information of a verified query finger vein A' and finger vein skeleton information of a verified query finger vein B' are fused to acquire a vein skeleton image C', and characteristic information is extracted, and the cipher key is extracted from the finger vein fusion fuzzy vault by adopting an unlocking algorithm. The fuzzy vault generated by using the finger vein image fusion is used to realize cipher key protection, and therefore safety performance is strong, realization efficiency is high; only a valid user is capable of extracting the cipher key having a CRC verification function by using a valid finger vein, and therefore confidentiality, integrity, and availability of cipher key safe storage are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of cryptography and biological feature identification, and in particular relates to a method for realizing a finger vein fusion fuzzy vault. Background technique [0002] As early as 1994, Bodo proposed in a German patent: directly apply the biological template data extraction, and the result is used as a key to provide a cryptographic system. This is the earliest scheme to combine cryptographic keys with biological templates. [0003] In 1998, Soutar proposed for the first time the concept and scheme of key binding with biological characteristics. The scheme can be divided into two phases: registration and certification. The purpose of the registration scheme is to bind any N-bit key with the user's fingerprint to generate biometric ciphertext for storage and verification. Davida et al. introduced the iris feature in the key. When the bit difference between the input and the template is within 10%, the k...

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Problems solved by technology

But the algorithm requires that the lock and unlock sets A and B must be ordered sets

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