輕量級密碼術包 Bouncy Castle
Bouncy Castle 是一種用于Java平臺的開放源碼的輕量級密碼術包。它支持大量的密碼術算法，并提供 JCE 1.2.1 的實現。Bouncy Castle是輕量級的，從J2SE 1.4到J2ME（包括MIDP）平臺，它都可以運行。它是在MIDP上運行的唯一完整的密碼術包。
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A lightweight cryptography API for Java and C#.
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A provider for the Java Cryptography Extension and the Java Cryptography Architecture.
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A clean room implementation of the JCE 1.2.1.
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A library for reading and writing encoded ASN.1 objects.
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A light weight client-side TLS API.
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Generators for Version 1 and Version 3 X.509 certificates, Version 2 CRLs, and PKCS12 files.
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Generators for Version 2 X.509 attribute certificates.
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Generators/Processors for S/MIME and CMS (PKCS7/RFC 3852).
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Generators/Processors for OCSP (RFC 2560).
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Generators/Processors for TSP (RFC 3161 & RFC 5544).
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Generators/Processors for CMP and CRMF (RFC 4210 & RFC 4211).
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Generators/Processors for OpenPGP (RFC 2440).
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A signed jar version suitable for JDK 1.4-1.6 and the Sun JCE.
