part3
Class EGPublicKey

java.lang.Object
  part3.EGPublicKey

Direct Known Subclasses:

EGVerificationKey

public class EGPublicKey

extends java.lang.Object

A class to implement an ElGamal public key.

Field Summary

protected java.math.BigInteger	_g
protected java.math.BigInteger	_p
protected java.math.BigInteger	_y

Constructor Summary

EGPublicKey(java.math.BigInteger p, java.math.BigInteger g, java.math.BigInteger y)
A constructor for an ElGamal public key (p,g,y).

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

Method Summary

EGCipherText	encrypt(java.math.BigInteger m, java.security.SecureRandom rnd) A method to encrypt the big integer m using this public key.
java.util.AbstractList	encrypt(java.lang.String s, java.security.SecureRandom rnd) A method to encrypt the string s using this public key.
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

_p

protected java.math.BigInteger _p

_g

protected java.math.BigInteger _g

_y

protected java.math.BigInteger _y

Constructor Detail

EGPublicKey

public EGPublicKey(java.math.BigInteger p,
                   java.math.BigInteger g,
                   java.math.BigInteger y)
            throws java.lang.Exception

A constructor for an ElGamal public key (p,g,y).

Throws:

Exception.

java.lang.Exception

EGPublicKey

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

A copy constructor for an ElGamal public key.

Throws:

Exception.

java.lang.Exception

Method Detail

encrypt

public EGCipherText encrypt(java.math.BigInteger m,
                            java.security.SecureRandom rnd)
                     throws java.lang.Exception

A method to encrypt the big integer m using this public key.

Throws:

Exception.

java.lang.Exception

encrypt

public java.util.AbstractList encrypt(java.lang.String s,
                                      java.security.SecureRandom rnd)
                               throws java.lang.Exception

A method to encrypt the string s using this public key.

Returns:

A list of EGCipherText objects.

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.