| AES | Advanced Encryption Standard |
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| AH | Authentication Header (IP protocol 51) |
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| CA | Certification Authority |
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| CBC | Cipher Block Chaining |
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| CRL | Certificate Revocation List |
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| DES | Data Encryption Standard |
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| ESP | Encapsulating Security Payload (IP protocol 50) |
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| FIPS | Federal Information Processing Standard |
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| HMAC | keyed-Hash Message Authentication Code (mostly 96 Bytes) (MD5, SHA) |
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| ICV | Integrity Check Value |
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| IKE | Internet Key Exchange (500/UDP, ISAKMP + OKEP, Main vs Aggressive Mode + Quick Mode) |
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| IP | Internet Protocol |
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| IPsec | IP Security |
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| ISAKMP | Internet SA and Key Management Protocol |
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| IV | Initialization Vector |
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| MAC | Message Authentication Code |
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| MD5 | |
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| OKEP | Oakley Key Exchange Protocol |
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| PKC | Public Key Certificate |
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| PKCS | Public Key Cryptography Standards |
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| PKI | Public Key Infrastructure |
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| PSK | Pre-Shared Keys |
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| SA | Security Association (SPI + IP Destination Address + Security Protocol Identifier) |
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| SAD | Security Association Database |
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| SHA-1 | |
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| SP | Security Policy |
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| SPD | Security Policy Database |
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| SPI | Security Parameters Index |
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| VPN | Virtual Private Network |
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| X.509 | |
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| |
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| SSL | Secure Socket Layer |
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| SSO | Single Sign-On |
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| TLS | Transport Layer Security (TLS v1 == SSL v3.1) |
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