In this paper, a fuzzy extractor based iris authentication scheme is provided, which combines error correcting codes and cryptography, when Hamming distance is adopted as the biometric matching metric.

The author of this article extracts cryptography key with biological significance from the biometrics by the fuzzy extractors, and applies it to the identity-based digital signature scheme.

And implements the fuzzy control simulation on the temperature of the environment chamber based on the adjustment of supply air system and hot water system using the method of self-abstracting rule fuzzy control (SARFC) and achieves satisfied control effect,providing a theoretic basis for further study on fuzzy control performance of environment chamber thermodynamic systems.