org.bouncycastle.crypto.params

Class SAKKEPrivateKeyParameters

java.lang.Object

org.bouncycastle.crypto.params.AsymmetricKeyParameter

org.bouncycastle.crypto.params.SAKKEPrivateKeyParameters

All Implemented Interfaces:

CipherParameters

public class SAKKEPrivateKeyParameters
extends AsymmetricKeyParameter

Represents a private key for the Sakai-Kasahara Key Encryption (SAKKE) scheme, as defined in RFC 6508.

SAKKE is an identity-based public key encryption scheme designed for one-pass key establishment. It is used in MIKEY-SAKKE for secure communication key distribution.

This class generates and manages a SAKKE private key, which consists of a randomly generated scalar z. The corresponding public key is computed as Z = [z]P, where P is a publicly known generator point on the elliptic curve.

The private key is used to derive the master secret in the key exchange process.

See Also:

RFC 6508: Sakai-Kasahara Key Encryption (SAKKE)

Constructor Summary

Constructors

Constructor and Description
SAKKEPrivateKeyParameters(java.math.BigInteger z, SAKKEPublicKeyParameters publicParams) Constructs a SAKKE private key with a given private value and associated public parameters.
SAKKEPrivateKeyParameters(java.security.SecureRandom random) Generates a random SAKKE private key and its corresponding public key.

Method Summary

Modifier and Type	Method and Description
java.math.BigInteger	getMasterSecret() Retrieves the private key scalar (master secret).
SAKKEPublicKeyParameters	getPublicParams() Retrieves the public key parameters associated with this private key.

Methods inherited from class org.bouncycastle.crypto.params.AsymmetricKeyParameter

isPrivate

Methods inherited from class java.lang.Object

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

Constructor Detail

SAKKEPrivateKeyParameters

public SAKKEPrivateKeyParameters(java.math.BigInteger z,
                                 SAKKEPublicKeyParameters publicParams)

Constructs a SAKKE private key with a given private value and associated public parameters.

Parameters:

z - The private key scalar.

publicParams - The associated public key parameters.

SAKKEPrivateKeyParameters

public SAKKEPrivateKeyParameters(java.security.SecureRandom random)

Generates a random SAKKE private key and its corresponding public key.

The private key scalar z is chosen randomly in the range [2, q-1], where q is the order of the subgroup. The public key is computed as Z = [z]P, where P is the public generator.

Parameters:

random - A cryptographic random number generator.

Method Detail

getPublicParams

public SAKKEPublicKeyParameters getPublicParams()

Retrieves the public key parameters associated with this private key.

Returns:

The corresponding SAKKE public key parameters.

getMasterSecret

public java.math.BigInteger getMasterSecret()

Retrieves the private key scalar (master secret).

Returns:

The private key scalar z.