org.bouncycastle.pqc.crypto.hqc

Class HQCParameters

java.lang.Object

org.bouncycastle.pqc.crypto.hqc.HQCParameters

All Implemented Interfaces:

CipherParameters, PQCParameters, KEMParameters

public class HQCParameters
extends java.lang.Object
implements KEMParameters, PQCParameters

Parameter sets of the HQC specification of 2026-10-12 (Tables 6, 8 and 9): n, n1, n2, k, delta, the weights omega and omega_r (= omega_e), the FFT exponent, the Barrett multiplier for n, the size of ekKEM and the Reed-Solomon generator polynomial over GF(2^8) = GF(2)[X]/(X^8 + X^4 + X^3 + X + 1).

Field Summary

Fields

Modifier and Type	Field and Description
static HQCParameters	hqc128
static HQCParameters	hqc192
static HQCParameters	hqc256

Method Summary

Modifier and Type	Method and Description
int	getClassicalSecurityStrength() Return the classical security strength of this parameter set: 128, 192 or 256 bits.
int	getEncapsulationLength()
java.lang.String	getName()
int	getPublicKeyBytes()
int	getSecretKeyBytes() Return the size of the decapsulation key encoding: the 32-byte seedKEM from which the whole key pair is derived, which is the only dkKEM format of the HQC specification of 2026-10-12.
int	getSecretLength()
int	getSecurityCategory() Return the NIST security category of this parameter set: 1 for HQC-128, 3 for HQC-192 and 5 for HQC-256 (the categories of the October 2026 specification; the HQC FIPS is still in development).
int	getSessionKeySize()

Methods inherited from class java.lang.Object

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

Field Detail

hqc128

public static final HQCParameters hqc128

hqc192

public static final HQCParameters hqc192

hqc256

public static final HQCParameters hqc256

Method Detail

getEncapsulationLength

public int getEncapsulationLength()

getSessionKeySize

public int getSessionKeySize()

getName

public java.lang.String getName()

getSecurityCategory

public int getSecurityCategory()

Return the NIST security category of this parameter set: 1 for HQC-128, 3 for HQC-192 and 5 for HQC-256 (the categories of the October 2026 specification; the HQC FIPS is still in development).

Specified by:

getSecurityCategory in interface PQCParameters

Returns:

the security category, as given in NIST IR 8547 Tables 3 and 5.

getClassicalSecurityStrength

public int getClassicalSecurityStrength()

Return the classical security strength of this parameter set: 128, 192 or 256 bits.

Specified by:

getClassicalSecurityStrength in interface PQCParameters

Returns:

the classical security strength in bits.

getPublicKeyBytes

public int getPublicKeyBytes()

getSecretKeyBytes

public int getSecretKeyBytes()

Return the size of the decapsulation key encoding: the 32-byte seedKEM from which the whole key pair is derived, which is the only dkKEM format of the HQC specification of 2026-10-12.

Returns:

32.

getSecretLength

public int getSecretLength()