APPARATUS AND METHDO FOR GIVING THE COMPRESSED ENCRYPTION FUNCTIONALITY TO INTEGER-BASED HOMOMORPHIC ENCRYPTION SCHEMES

摘要

An apparatus for compressing encryption and decryption according to an embodiment of the present invention includes an interface for receiving a public key, a secret key, and a compression ratio, a memory for storing instructions for encrypting and decrypting plain text, and a processor for encrypting and decrypting plain text according to instructions. The instructions may include changing the public key and the private key according to a compression ratio to generate an extended public key and an extended private key, outputting an extended public key, and receiving a compressed cipher text; And decrypting the compressed cipher text through the remaining operations on the product of the extended secret key and the compressed cipher text.