Key conversion method, system and device for homomorphic cryptographic operation and readable storage medium
A conversion method and key technology, applied in the direction of homomorphic encryption communication, transmission system, digital transmission system, etc., can solve the problems of low operation efficiency, complex calculation of fully homomorphic encryption scheme, large key size, etc., and achieve accelerated operation. speed, reduced computation time, short time effect
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[0048]The present invention will be further described in detail below in conjunction with specific embodiments, which are to explain rather than limit the present invention.
[0049]Such asfigure 2 with3As shown, the present invention discloses a key conversion system for homomorphic cryptographic operations, including a conversion key generation module and a key conversion module; the conversion key generation module is used to process externally input ciphertext data, Converted into the extended secret key parameters required by the key conversion module, and caches the externally input ciphertext data, and passes the extended secret key parameters and cached data to the key conversion module; the key conversion module is used to The extended secret key parameters and the ciphertext of the cached data are used as input, and the dimensionality reduction of the ciphertext is realized through polynomial operation and finally modulo operation.
[0050]Conversion key generation module genera...
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