Package edu.fiu.adwise.homomorphic_encryption.socialistmillionaire

Interface alice_interface

All Known Implementing Classes:

alice, alice_elgamal, alice_joye, alice_veugen

public interface alice_interface

Interface defining the operations for Alice in the Socialist Millionaires' Problem (SMP) protocol. This interface includes methods for secure multi-party computation using homomorphic encryption.

Method Summary

Modifier and Type	Method	Description
BigInteger	division(BigInteger x, long d)	Performs division on an encrypted integer.
boolean	encrypted_equals(BigInteger x, BigInteger y)	Compares two encrypted integers for equality.
BigInteger[]	getKValues(BigInteger[] input, int k, boolean biggest_first)	Retrieves the k largest or smallest values from an array of encrypted integers.
BigInteger[]	getKValues(List<BigInteger> input, int k, boolean smallest_first)	Retrieves the k largest or smallest values from a list of encrypted integers.
BigInteger	multiplication(BigInteger x, BigInteger y)	Performs multiplication on two encrypted integers.
boolean	Protocol1(BigInteger x)	Compares Alice's private integer with Bob's private integer.
boolean	Protocol2(BigInteger x, BigInteger y)	Compares two encrypted integers and determines if the first is greater than or equal to the second.
void	receivePublicKeys()	Receives public keys from the other party.
void	set_socket(Socket socket)	Sets the socket for communication.

Method Details

encrypted_equals

boolean encrypted_equals(BigInteger x,
 BigInteger y)
                  throws HomomorphicException,
IOException,
ClassNotFoundException

Compares two encrypted integers for equality.

Parameters:

x - the first encrypted integer.

y - the second encrypted integer.

Returns:

true if the integers are equal, false otherwise.

Throws:

HomomorphicException - if a homomorphic encryption error occurs.

IOException - if an I/O error occurs.

ClassNotFoundException - if the class of a serialized object cannot be found.

Protocol1

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

Compares Alice's private integer with Bob's private integer.

Parameters:

x - Alice's private integer.

Returns:

true if the comparison satisfies the protocol, false otherwise.

Throws:

IOException - if an I/O error occurs.

IllegalArgumentException - if an invalid argument is provided.

HomomorphicException - if a homomorphic encryption error occurs.

ClassNotFoundException - if the class of a serialized object cannot be found.

Protocol2

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

Compares two encrypted integers and determines if the first is greater than or equal to the second.

Parameters:

x - the first encrypted integer.

y - the second encrypted integer.

Returns:

true if x is greater than or equal to y, false otherwise.

Throws:

IOException - if an I/O error occurs.

ClassNotFoundException - if the class of a serialized object cannot be found.

HomomorphicException - if a homomorphic encryption error occurs.

division

BigInteger division(BigInteger x,
 long d)
             throws IOException,
ClassNotFoundException,
HomomorphicException

Performs division on an encrypted integer.

Parameters:

x - the encrypted integer to divide.

d - the divisor.

Returns:

the result of the division as an encrypted integer.

Throws:

IOException - if an I/O error occurs.

ClassNotFoundException - if the class of a serialized object cannot be found.

HomomorphicException - if a homomorphic encryption error occurs.

multiplication

BigInteger multiplication(BigInteger x,
 BigInteger y)
                   throws IOException,
ClassNotFoundException,
IllegalArgumentException,
HomomorphicException

Performs multiplication on two encrypted integers.

Parameters:

x - the first encrypted integer.

y - the second encrypted integer.

Returns:

the result of the multiplication as an encrypted integer.

Throws:

IOException - if an I/O error occurs.

ClassNotFoundException - if the class of a serialized object cannot be found.

IllegalArgumentException - if an invalid argument is provided.

HomomorphicException - if a homomorphic encryption error occurs.

receivePublicKeys

void receivePublicKeys()
                throws IOException,
ClassNotFoundException

Receives public keys from the other party.

Throws:

IOException - if an I/O error occurs.

ClassNotFoundException - if the class of a serialized object cannot be found.

getKValues

BigInteger[] getKValues(BigInteger[] input,
 int k,
 boolean biggest_first)
                 throws ClassNotFoundException,
IOException,
IllegalArgumentException,
HomomorphicException

Retrieves the k largest or smallest values from an array of encrypted integers.

Parameters:

input - the array of encrypted integers.

k - the number of values to retrieve.

biggest_first - true to retrieve the largest values, false to retrieve the smallest values.

Returns:

an array of the k largest or smallest encrypted integers.

Throws:

ClassNotFoundException - if the class of a serialized object cannot be found.

IOException - if an I/O error occurs.

IllegalArgumentException - if an invalid argument is provided.

HomomorphicException - if a homomorphic encryption error occurs.

getKValues

BigInteger[] getKValues(List<BigInteger> input,
 int k,
 boolean smallest_first)
                 throws ClassNotFoundException,
IOException,
IllegalArgumentException,
HomomorphicException

Retrieves the k largest or smallest values from a list of encrypted integers.

Parameters:

input - the list of encrypted integers.

k - the number of values to retrieve.

smallest_first - true to retrieve the smallest values, false to retrieve the largest values.

Returns:

an array of the k largest or smallest encrypted integers.

Throws:

ClassNotFoundException - if the class of a serialized object cannot be found.

IOException - if an I/O error occurs.

IllegalArgumentException - if an invalid argument is provided.

HomomorphicException - if a homomorphic encryption error occurs.

set_socket

void set_socket(Socket socket)
         throws IOException

Sets the socket for communication.

Parameters:

socket - the socket to use for communication.

Throws:

IOException - if an I/O error occurs.