Apparatus and method for giving the compressed encryption functionality to integer-based homomorphic encryption schemes
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United States of America Patent
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May 3, 2016
Grant Date -
Jun 25, 2015
app pub date -
Jun 23, 2014
filing date -
Dec 23, 2013
priority date (Note) -
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Abstract
The present invention relates to a compressed encryption and decryption apparatus comprising: an interface receiving a public key, a secret key and a compression ratio; a memory storing instructions for encryption and decryption of plaintexts; and a processor encrypting and decrypting plaintexts according to the instruction, wherein the instruction comprises instructions performing; generating an extended public key and an extended secret key by revising the public key and the secret key according to the compression ratio; outputting the extended public key; receiving compressed ciphertext; and decrypting the compressed ciphertext using modulo operation for multiplication of the extended secret key and the compressed ciphertext.
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