Package edu.fiu.adwise.homomorphic_encryption.socialistmillionaire

Class alice_veugen

java.lang.Object

edu.fiu.adwise.homomorphic_encryption.socialistmillionaire.socialist_millionaires

edu.fiu.adwise.homomorphic_encryption.socialistmillionaire.alice

edu.fiu.adwise.homomorphic_encryption.socialistmillionaire.alice_veugen

All Implemented Interfaces:

CipherConstants, alice_interface

Direct Known Subclasses:

alice_elgamal

public class alice_veugen
extends alice

See the papers "Improving the DGK comparison protocol" and Correction to ”Improving the DGK comparison protocol” by Thjis Veugen, You can find these in the papers directory! Represents Alice's implementation of the Veugen protocol for secure comparison. This class extends the base `alice` class and provides methods for secure computation using homomorphic encryption schemes such as DGK and Paillier.

Field Summary

Fields inherited from interface edu.fiu.adwise.homomorphic_encryption.misc.CipherConstants

BILLION, CERTAINTY, EIGHT, FIELD_SIZE, FIVE, FOUR, KEY_SIZE, NEG_ONE, THREE, TWO

Constructor Summary

Constructors

Constructor	Description
alice_veugen()	Constructs an instance of `alice_veugen`.

Method Summary

Modifier and Type	Method	Description
boolean	Protocol1(BigInteger x)	See the paper "Improving the DGK comparison protocol", this implements Protocol 3.
boolean	Protocol2(BigInteger x, BigInteger y)	See the paper Corrrection to "Improving the DGK comparison protocol", this implements Protocol 3, Steps 4a - 4j This is Veugen's improved encrypted integer comparison protocol from DGK

Methods inherited from class edu.fiu.adwise.homomorphic_encryption.socialistmillionaire.alice

division, encrypted_equals, encrypted_xor, getKValues, getKValues, multiplication, private_equals, receivePublicKeys, set_dgk_private_key, set_socket

Methods inherited from class edu.fiu.adwise.homomorphic_encryption.socialistmillionaire.socialist_millionaires

get_bytes_sent, getDGKPublicKey, getElGamalPublicKey, getPaillierPublicKey, isDGK, readBoolean, readInt, readObject, setDGKMode, setDGKPublicKey, setElGamalPublicKey, setPaillierPublicKey, writeBoolean, writeInt, writeObject

Methods inherited from class java.lang.Object

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

Constructor Details

alice_veugen

public alice_veugen()

Constructs an instance of `alice_veugen`.

Method Details

Protocol1

public boolean Protocol1(BigInteger x)
                  throws ClassNotFoundException,
IOException,
HomomorphicException

See the paper "Improving the DGK comparison protocol", this implements Protocol 3. This is an improved version of Protocol 1, initially created by DGK, see original alice class This protocol determines if the plaintext value `x` is less than or equal to `y`

Specified by:

Protocol1 in interface alice_interface

Overrides:

Protocol1 in class alice

Parameters:

x - the plaintext value to compare.

Returns:

true if x <= y, false otherwise.

Throws:

ClassNotFoundException - if a class cannot be found during deserialization.

IOException - if an I/O error occurs during communication.

HomomorphicException - if an error occurs during homomorphic operations.

Protocol2

public boolean Protocol2(BigInteger x,
 BigInteger y)
                  throws IOException,
ClassNotFoundException,
HomomorphicException

See the paper Corrrection to "Improving the DGK comparison protocol", this implements Protocol 3, Steps 4a - 4j This is Veugen's improved encrypted integer comparison protocol from DGK

Specified by:

Protocol2 in interface alice_interface

Overrides:

Protocol2 in class alice

Parameters:

x - the encrypted value to compare.

y - the encrypted value to compare against.

Returns:

true if x >= y, false otherwise.

Throws:

IOException - if an I/O error occurs during communication.

ClassNotFoundException - if a class cannot be found during deserialization.

HomomorphicException - if an error occurs during homomorphic operations.