part7
Class ECPublicKey

java.lang.Object
  part7.ECPublicKey

public class ECPublicKey

extends java.lang.Object

A class to implement a public key for ElGamal using elliptics curves.

Field Summary

protected ECPoint	_b
protected Curve	_c
protected ECPoint	_p

Constructor Summary

ECPublicKey(Curve c, ECPoint b, ECPoint p)
A constructor for an ElGamal public key (c,b,p).

ECPublicKey(ECPublicKey key)
A copy constructor for an ElGamal public key.

Method Summary

ECCipherText	encrypt(ECPoint m, java.security.SecureRandom rnd) A method to encrypt the point m using this public key.
MVCipherText	MVEncrypt(java.math.BigInteger x1, java.math.BigInteger x2, java.security.SecureRandom rnd) A method to encrypt the message (x1,x2) using this public key with Menezes-Vanstone.
java.lang.String	toString() A method to produce a string representation of this public EG key.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

_c

protected Curve _c

_b

protected ECPoint _b

_p

protected ECPoint _p

Constructor Detail

ECPublicKey

public ECPublicKey(Curve c,
                   ECPoint b,
                   ECPoint p)
            throws java.lang.Exception

A constructor for an ElGamal public key (c,b,p).

Throws:

Exception.

java.lang.Exception

ECPublicKey

public ECPublicKey(ECPublicKey key)
            throws java.lang.Exception

A copy constructor for an ElGamal public key.

Throws:

Exception.

java.lang.Exception

Method Detail

encrypt

public ECCipherText encrypt(ECPoint m,
                            java.security.SecureRandom rnd)
                     throws java.lang.Exception

A method to encrypt the point m using this public key.

Throws:

Exception.

java.lang.Exception

MVEncrypt

public MVCipherText MVEncrypt(java.math.BigInteger x1,
                              java.math.BigInteger x2,
                              java.security.SecureRandom rnd)
                       throws java.lang.Exception

A method to encrypt the message (x1,x2) using this public key with Menezes-Vanstone.

Throws:

Exception.

java.lang.Exception

toString

public java.lang.String toString()

A method to produce a string representation of this public EG key.

Throws:

Exception.