FIPS PUBS 140-1. Federal Information Standards Publications (FIPS PUBS) 140-1 is a US government standard for implementing cryptographic modules such as hardware or software that encrypts and decrypts data, creates and verifies digital signatures, and other cryptographics functions.

Hypertext Transport Protocol (HTTP) and Hypertext Transport Protocol Secure (HTTPS). Protocols used to communicate with web servers.

KEYGEN tag. An HTML tag that generates a key pair for use with a certificate.

Lightweight Directory Access Protocol (LDAP) v2, v3. A directory service protocol designed to run over TCP/IP and across multiple platforms. LDAP is a simplified version of Directory Access Protocol (DAP), used to access X.500 directories. LDAP is under IETF change control and has evolved to meet Internet requirements.

Public-Key Cryptography Standard (PKCS) #7. An encrypted data and message format developed by RSA Data Security to represent digital signatures, certificate chains, and encrypted data. This format is used to deliver certificates to end entities.

Public-Key Cryptography Standard (PKCS) #10. A message format developed by RSA Data Security for certificate requests. This format is supported by many server products.

Public-Key Cryptography Standard (PKCS) #11. Specifies an API used to communicate with devices such as hardware tokens that hold cryptographic information and perform cryptographic operations.

X.509 v1, v3. Digital certificate formats recommended by the International Telecommunications Union (ITU).

Secure Sockets Layer (SSL) 2.0, 3.0. A set of rules governing server authentication, client authentication, and encrypted communication between servers and clients.

Security-Enhanced Linux. Security-enhanced Linux, or SELinux, is a set of security protocols enforcing mandatory access control on Linux system kernels. This was developed by the United States National Security Agency to keep applications from accessing confidential or protected files through lenient or flawed access controls.