Package org.apache.sysds.runtime.controlprogram.paramserv.homomorphicEncryption

Class SEALServer

java.lang.Object
org.apache.sysds.runtime.controlprogram.paramserv.homomorphicEncryption.SEALServer
public class SEALServer extends Object

  • Constructor Details

    • SEALServer

      public SEALServer()

  • Method Details

    • generateA

      public byte[] generateA()
      this generates the a constant. in a future version we want to generate this together with the clients to prevent misuse
      Returns:
      serialized a constant

    • aggregatePartialPublicKeys

      public PublicKey aggregatePartialPublicKeys(PublicKey[] partial_public_keys)
      accumulates the given partial public keys into a public key, stores it in ctx and returns it
      Parameters:
      partial_public_keys - an array of partial public keys generated with SEALServer::generatePartialPublicKey
      Returns:
      the aggregated public key

    • accumulateCiphertexts

      public CiphertextMatrix accumulateCiphertexts(CiphertextMatrix[] ciphertexts)
      accumulates the given ciphertext blocks into a sum ciphertext and returns it
      Parameters:
      ciphertexts - ciphertexts encrypted with the partial public keys
      Returns:
      the accumulated ciphertext (which is the homomorphic sum of ciphertexts)

    • average

      public MatrixObject average(CiphertextMatrix encrypted_sum, PlaintextMatrix[] partial_plaintexts)
      averages the partial decryptions
      Parameters:
      encrypted_sum - is the result of accumulateCiphertexts()
      partial_plaintexts - is the result of SEALServer::partiallyDecrypt of each ciphertext fed into accumulateCiphertexts
      Returns:
      the unencrypted, element-wise average of the original matrices