Lightweight Crypto Packages

org.bouncycastle.crypto	Base classes for the lightweight API.
org.bouncycastle.crypto.agreement	Basic key agreement classes.
org.bouncycastle.crypto.agreement.ecjpake
org.bouncycastle.crypto.agreement.jpake	Support classes for Password Authenticated Key Exchange by Juggling (J-PAKE) key exchange.
org.bouncycastle.crypto.agreement.kdf	Support classes for KDF based key derivation functions.
org.bouncycastle.crypto.agreement.owl
org.bouncycastle.crypto.agreement.owl.test
org.bouncycastle.crypto.agreement.srp	Support classes for Secure Remote Password (SRP) protocol.
org.bouncycastle.crypto.agreement.test
org.bouncycastle.crypto.commitments	Classes for supporting commitment calculation.
org.bouncycastle.crypto.constraints
org.bouncycastle.crypto.digests	Message digest classes.
org.bouncycastle.crypto.ec	Utility classes for support Elliptic Curve cryptographic transforms.
org.bouncycastle.crypto.ec.test
org.bouncycastle.crypto.encodings	Block encodings for asymmetric ciphers.
org.bouncycastle.crypto.engines	Basic cipher classes.
org.bouncycastle.crypto.fpe
org.bouncycastle.crypto.generators	Generators for keys, key pairs and password based encryption algorithms.
org.bouncycastle.crypto.hpke
org.bouncycastle.crypto.io	Classes for doing "enhanced" I/O with Digests and MACs.
org.bouncycastle.crypto.kems	Key Encapsulation Mechanisms.
org.bouncycastle.crypto.kems.cmce
org.bouncycastle.crypto.kems.frodo
org.bouncycastle.crypto.kems.mlkem
org.bouncycastle.crypto.macs	Classes for creating MACs and HMACs.
org.bouncycastle.crypto.modes	Modes for symmetric ciphers.
org.bouncycastle.crypto.modes.gcm	GCM mode support classes.
org.bouncycastle.crypto.modes.kgcm
org.bouncycastle.crypto.paddings	Paddings for symmetric ciphers.
org.bouncycastle.crypto.params	Classes for parameter objects for ciphers and generators.
org.bouncycastle.crypto.parsers	Helper classes for parsing "on the wire" public keys.
org.bouncycastle.crypto.prng	Lightweight psuedo-random number generators and SecureRandom builders.
org.bouncycastle.crypto.prng.drbg	SP800-90A deterministic random bit generators, can be used stand alone or in conjunction with SP800SecureRandomBuilder class.
org.bouncycastle.crypto.prng.test
org.bouncycastle.crypto.signers	Basic signers.
org.bouncycastle.crypto.signers.mldsa
org.bouncycastle.crypto.signers.slhdsa
org.bouncycastle.crypto.test
org.bouncycastle.crypto.threshold
org.bouncycastle.crypto.threshold.test
org.bouncycastle.crypto.tls
org.bouncycastle.crypto.util	Some general utility/conversion classes.

ASN.1 Support Packages

org.bouncycastle.asn1	A library for parsing and writing ASN.1 objects.
org.bouncycastle.asn1.anssi	Support classes for the French ANSSI EC curves.
org.bouncycastle.asn1.bc	ASN.1 classes specific to the Bouncy Castle APIs.
org.bouncycastle.asn1.bsi	ASN.1 classes specific to the Bundesamt für Sicherheit in der Informationstechnik (BSI) standards.
org.bouncycastle.asn1.cmc	Support classes for Certificate Management over CMS (CMC) - RFC 5272 and RFC 6402.
org.bouncycastle.asn1.cmp	Support classes useful for encoding and supporting PKIX-CMP as described RFC 4210.
org.bouncycastle.asn1.cms	Support classes useful for encoding and supporting Cryptographic Message Syntax as described in PKCS#7 and RFC 3369 (formerly RFC 2630).
org.bouncycastle.asn1.cms.ecc	Support classes for CMS ECC - RFC 5753/3278.
org.bouncycastle.asn1.crmf	Support classes useful for encoding and supporting PKIX-CRMF as described RFC 4211.
org.bouncycastle.asn1.cryptlib
org.bouncycastle.asn1.cryptopro	Support classes for CRYPTO-PRO related objects - such as GOST identifiers.
org.bouncycastle.asn1.dvcs	Support classes useful for encoding and processing Data Validation and Certification Server (DVCS) protocols as described in RFC 3029.
org.bouncycastle.asn1.eac	ASN.1 classes specific to the Bundesamt für Sicherheit in der Informationstechnik (BSI) Technical Guideline Advanced Security Mechanisms for Machine Readable Travel Documents.
org.bouncycastle.asn1.edec
org.bouncycastle.asn1.esf	Support classes useful for encoding and supporting [ESF] RFC3126 Electronic Signature Formats for long term electronic signatures.
org.bouncycastle.asn1.ess	Support classes useful for encoding and supporting Enhanced Security Services for S/MIME as described RFC 2634 and RFC 5035.
org.bouncycastle.asn1.est	Support classes for Enrollment over Secure Transport (EST) - RFC 7030.
org.bouncycastle.asn1.gm	Support classes for Chinese Standard (GM) standard curves and algorithms.
org.bouncycastle.asn1.gnu	ASN.1 classes specific to the GNU APIs and applications.
org.bouncycastle.asn1.iana	ASN.1 classes specific to the Internet Assigned Numbers Authority (IANA).
org.bouncycastle.asn1.icao	ICAO ASN.1 classes for electronic passport.
org.bouncycastle.asn1.isara
org.bouncycastle.asn1.isismtt	Support classes for the ISIS-MTT Project.
org.bouncycastle.asn1.isismtt.ocsp	Support classes for the ISIS-MTT profile for OCSP.
org.bouncycastle.asn1.isismtt.x509	Support classes for the ISIS-MTT X.509 Certificate Extensions.
org.bouncycastle.asn1.iso	Support classes for various ISO Standards.
org.bouncycastle.asn1.kisa	Support classes for the Korea Information Security Agency (KISA) standard - SEED algorithm.
org.bouncycastle.asn1.microsoft	Support for Microsoft specific ASN.1 classes and object identifiers.
org.bouncycastle.asn1.misc	Miscellaneous object identifiers and objects.
org.bouncycastle.asn1.mod
org.bouncycastle.asn1.mozilla	Support classes useful for encoding objects used by mozilla.
org.bouncycastle.asn1.nist	Support classes for NIST related objects.
org.bouncycastle.asn1.nsri	Support classes algorithms from the Korean National Security Research Institute.
org.bouncycastle.asn1.ntt	ASN.1 classes relevant to the standards produced by Nippon Telegraph and Telephone.
org.bouncycastle.asn1.ocsp	Support classes useful for encoding and supporting OCSP objects.
org.bouncycastle.asn1.oiw	Objects and OID for the support of ISO OIW.
org.bouncycastle.asn1.pkcs	Support classes useful for encoding and supporting the various RSA PKCS documents.
org.bouncycastle.asn1.plants
org.bouncycastle.asn1.rosstandart	Support classes algorithms from the Russian Federal Agency on Technical Regulating and Metrology - Rosstandart.
org.bouncycastle.asn1.sec	Classes for support of the SEC standard for Elliptic Curve.
org.bouncycastle.asn1.smime	Support classes useful for encoding and supporting S/MIME.
org.bouncycastle.asn1.teletrust	Support classes for TeleTrust related objects.
org.bouncycastle.asn1.test
org.bouncycastle.asn1.tsp	Support classes useful for encoding and supporting Time Stamp Protocol as described RFC 3161.
org.bouncycastle.asn1.ua	Support classes for the Ukrainian DSTU standard.
org.bouncycastle.asn1.util	An ASN.1 dump utility.
org.bouncycastle.asn1.x500	Support classes for the creation and processing of object based on X.500 names.
org.bouncycastle.asn1.x500.style	Template classes for the common styles used for converting X.500 names to strings and back.
org.bouncycastle.asn1.x509	Support classes useful for encoding and processing X.509 certificates.
org.bouncycastle.asn1.x509.qualified	Support classes useful for encoding and processing messages based around RFC3739
org.bouncycastle.asn1.x509.sigi	Support classes for the German SigI (Signature Interoperability Specification) standard.
org.bouncycastle.asn1.x9	Support classes useful for encoding and supporting X9.62 elliptic curve.

Utility Packages

org.bouncycastle.math	The Bouncy Castle math package.
org.bouncycastle.math.ec	Math support for Elliptic Curve.
org.bouncycastle.math.ec.custom.djb	Experimental implementation of curve25519.
org.bouncycastle.math.ec.custom.gm	Custom implementation of SM2 EC curve, SM2-P256V1.
org.bouncycastle.math.ec.custom.sec	Custom implementations of (most of) the curves over Fp from the SEC specification.
org.bouncycastle.math.ec.custom.sec.test
org.bouncycastle.math.ec.endo
org.bouncycastle.math.ec.rfc7748
org.bouncycastle.math.ec.rfc7748.test
org.bouncycastle.math.ec.rfc8032
org.bouncycastle.math.ec.rfc8032.test
org.bouncycastle.math.ec.test
org.bouncycastle.math.ec.tools
org.bouncycastle.math.field
org.bouncycastle.math.raw	Math support for raw multi-precision calculations.
org.bouncycastle.math.raw.test
org.bouncycastle.math.test
org.bouncycastle.util	General purpose utility classes used throughout the APIs.
org.bouncycastle.util.encoders	Classes for producing and reading Base64 and Hex strings.
org.bouncycastle.util.encoders.test
org.bouncycastle.util.io	General purpose I/O helper classes and wrappers.
org.bouncycastle.util.io.pem	Classes for reading and writing raw PEM objects.
org.bouncycastle.util.io.pem.test
org.bouncycastle.util.io.test
org.bouncycastle.util.test	Light weight test API.
org.bouncycastle.util.utiltest

Post-Quantum Lightweight Crypto Packages

org.bouncycastle.pqc.crypto
org.bouncycastle.pqc.crypto.aimer
org.bouncycastle.pqc.crypto.cmce
org.bouncycastle.pqc.crypto.crystals.dilithium
org.bouncycastle.pqc.crypto.faest
org.bouncycastle.pqc.crypto.falcon
org.bouncycastle.pqc.crypto.frodo
org.bouncycastle.pqc.crypto.haetae
org.bouncycastle.pqc.crypto.hawk
org.bouncycastle.pqc.crypto.hqc
org.bouncycastle.pqc.crypto.mayo
org.bouncycastle.pqc.crypto.mldsa
org.bouncycastle.pqc.crypto.mlkem
org.bouncycastle.pqc.crypto.mqom
org.bouncycastle.pqc.crypto.newhope	Low level implementation of the NewHope key exchange algorithm.
org.bouncycastle.pqc.crypto.ntru
org.bouncycastle.pqc.crypto.ntruplus
org.bouncycastle.pqc.crypto.ntruprime
org.bouncycastle.pqc.crypto.qruov
org.bouncycastle.pqc.crypto.saber
org.bouncycastle.pqc.crypto.sdith
org.bouncycastle.pqc.crypto.slhdsa
org.bouncycastle.pqc.crypto.snova
org.bouncycastle.pqc.crypto.sphincs	Low level implementation of the SPHINCS-256 signature algorithm.
org.bouncycastle.pqc.crypto.sqisign
org.bouncycastle.pqc.crypto.uov
org.bouncycastle.pqc.crypto.util
org.bouncycastle.pqc.crypto.xwing

Post-Quantum Lightweight Math Packages

org.bouncycastle.pqc.math.ntru
org.bouncycastle.pqc.math.ntru.parameters

Post-Quantum ASN.1 Packages

org.bouncycastle.pqc.asn1

ASN.1 Support classes for PQC algorithms.

Post-Quantum Test Packages

org.bouncycastle.pqc.crypto.test