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

Class NativeHEHelper

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

  • Constructor Summary

    Constructors
    Constructor
    Description
    NativeHEHelper()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static byte[]
    accumulateCiphertexts(long server, byte[][] ciphertexts)
    accumulates the given ciphertexts into a sum ciphertext and returns it
    static byte[]
    aggregatePartialPublicKeys(long server, byte[][] partial_public_keys)
    accumulates the given partial public keys into a public key, stores it in server and returns it
    static double[]
    average(long server, byte[] encrypted_sum, byte[][] partial_plaintexts)
    averages the partial decryptions and returns the result
    static byte[]
    encrypt(long client, double[] plaintexts)
    encrypts data with public key stored in client setPublicKey() must have been called before calling this
    static byte[]
    generateA(long server)
    this generates the a constant.
    static byte[]
    generatePartialPublicKey(long client)
    generates a partial public key stores a partial private key corresponding to the partial public key in client
    static long
    initClient(byte[] a)
    generates a Client object
    static boolean
    initialize()
     
    static long
    initServer()
    generates the Server object and returns a pointer to it
    static byte[]
    partiallyDecrypt(long client, byte[] ciphertext)
    partially decrypts ciphertexts with the partial private key.
    static void
    setPublicKey(long client, byte[] public_key)
    sets the public key and stores it in client

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • NativeHEHelper

      public NativeHEHelper()

  • Method Details

    • initialize

      public static boolean initialize()

    • initClient

      public static long initClient(byte[] a)
      generates a Client object
      Parameters:
      a - a constant generated by generateA
      Returns:
      a pointer to the native client object

    • generatePartialPublicKey

      public static byte[] generatePartialPublicKey(long client)
      generates a partial public key stores a partial private key corresponding to the partial public key in client
      Parameters:
      client - A pointer to a Client, obtained from initClient
      Returns:
      a serialized partial public key

    • setPublicKey

      public static void setPublicKey(long client, byte[] public_key)
      sets the public key and stores it in client
      Parameters:
      client - A pointer to a Client, obtained from initClient
      public_key - serialized public key obtained from generatePartialPublicKey

    • encrypt

      public static byte[] encrypt(long client, double[] plaintexts)
      encrypts data with public key stored in client setPublicKey() must have been called before calling this
      Parameters:
      client - A pointer to a Client, obtained from initClient
      plaintexts - array of double values to be encrypted
      Returns:
      serialized ciphertext

    • partiallyDecrypt

      public static byte[] partiallyDecrypt(long client, byte[] ciphertext)
      partially decrypts ciphertexts with the partial private key. generatePartialPublicKey() must have been called before calling this function
      Parameters:
      client - A pointer to a Client, obtained from initClient
      ciphertext - serialized ciphertext
      Returns:
      serialized partial decryption

    • initServer

      public static long initServer()
      generates the Server object and returns a pointer to it
      Returns:
      pointer to a native Server object

    • generateA

      public static byte[] generateA(long server)
      this generates the a constant. in a future version we want to generate this together with the clients to prevent misuse
      Parameters:
      server - A pointer to a Server, obtained from initServer
      Returns:
      serialized a constant

    • aggregatePartialPublicKeys

      public static byte[] aggregatePartialPublicKeys(long server, byte[][] partial_public_keys)
      accumulates the given partial public keys into a public key, stores it in server and returns it
      Parameters:
      server - A pointer to a Server, obtained from initServer
      partial_public_keys - array of serialized partial public keys
      Returns:
      serialized partial public key

    • accumulateCiphertexts

      public static byte[] accumulateCiphertexts(long server, byte[][] ciphertexts)
      accumulates the given ciphertexts into a sum ciphertext and returns it
      Parameters:
      server - A pointer to a Server, obtained from initServer
      ciphertexts - array of serialized ciphertexts
      Returns:
      serialized accumulated ciphertext

    • average

      public static double[] average(long server, byte[] encrypted_sum, byte[][] partial_plaintexts)
      averages the partial decryptions and returns the result
      Parameters:
      server - A pointer to a Server, obtained from initServer
      encrypted_sum - the result of accumulateCiphertexts()
      partial_plaintexts - the result of partiallyDecrypt of each ciphertext fed into accumulateCiphertexts
      Returns:
      average of original data