Bouncy Castle Cryptography Library 1.80 · org.bouncycastle.pqc.crypto.ntru.NTRUOWCPA

Modifier and Type	Field and Description
private final NTRUParameterSet	params
private final NTRUSampling	sampling

Access	Constructor and Description
public	NTRUOWCPA(NTRUParameterSet params)

Method Summary

Modifier and Type	Method and Description
private int	checkCiphertext(byte[] ciphertext)
private int	Returns: 0 on success (t=0), 1 on failure checkM(HPSPolynomial m) Check that m is in message space, i.e. (1) \|{i : m[i] = 1}\| = \|{i : m[i] = 2}\|, and (2) \|{i : m[i] != 0}\| = NTRU_WEIGHT.
private int	checkR(Polynomial r)
public OWCPADecryptResult	Returns: an instance of `OWCPADecryptResult` containing `packed_rm` and fail flag decrypt(byte[] ciphertext, byte[] privateKey) DPKE decryption.
public byte[]	Returns: DPKE ciphertext encrypt(Polynomial r, Polynomial m, byte[] publicKey) DPKE encryption.
public OWCPAKeyPair	Returns: DPKE key pair keypair(byte[] a random byte array seed) Generate a DPKE key pair.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

params	back to summary
private final NTRUParameterSet params

sampling	back to summary
private final NTRUSampling sampling

NTRUOWCPA	back to summary
public NTRUOWCPA(NTRUParameterSet params)

checkCiphertext	back to summary
private int checkCiphertext(byte[] ciphertext)

checkM	back to summary
private int checkM(HPSPolynomial m) Check that m is in message space, i.e. (1) \|{i : m[i] = 1}\| = \|{i : m[i] = 2}\|, and (2) \|{i : m[i] != 0}\| = NTRU_WEIGHT. Note We may assume that m has coefficients in {0,1,2}. Returns:int 0 on success (t=0), 1 on failure

checkM

private int checkM(HPSPolynomial m)

Check that m is in message space, i.e. (1) |{i : m[i] = 1}| = |{i : m[i] = 2}|, and (2) |{i : m[i] != 0}| = NTRU_WEIGHT.

Note

We may assume that m has coefficients in {0,1,2}.

checkR	back to summary
private int checkR(Polynomial r)

decrypt back to summary

decrypt	back to summary
public OWCPADecryptResult decrypt(byte[] ciphertext, byte[] privateKey) DPKE decryption. Returns:OWCPADecryptResult an instance of `OWCPADecryptResult` containing `packed_rm` and fail flag See Also NTRU specification section 1.11.4

public OWCPADecryptResult decrypt(byte[] ciphertext, byte[] privateKey)

DPKE decryption.

Returns:OWCPADecryptResult: an instance of OWCPADecryptResult containing packed_rm and fail flag
See Also: NTRU specification section 1.11.4

encrypt	back to summary
public byte[] encrypt(Polynomial r, Polynomial m, byte[] publicKey) DPKE encryption. Returns:byte[] DPKE ciphertext See Also NTRU specification section 1.11.3

encrypt

public byte[] encrypt(Polynomial r, Polynomial m, byte[] publicKey)

DPKE encryption.

keypair	back to summary
public OWCPAKeyPair keypair(byte[] seed) Generate a DPKE key pair. Parameters seed:byte[] a random byte array Returns:OWCPAKeyPair DPKE key pair See Also NTRU specification section 1.11.1

keypair

public OWCPAKeyPair keypair(byte[] seed)

Generate a DPKE key pair.

Parameters