PGP Command Line: Technical Specification

Supported Operating Systems

• Windows Vista (all 32-bit and 64-bit editions)
• Windows 2003 (SP2)
• Windows XP (SP2, 32-bit and 64-bit editions)
• Windows 2000 (SP4)
• HP-UX 11i or above (PA-RISC and Itanium)
• IBM AIX 5.2 and 5.3
• RedHat Enterprise Linux 3.0 or above (x86 and x86_64)
• Sun Solaris 9 (SPARC only) and 10 (SPARC, x86, and x86_64)
• Fedora Core 6 and above (x86_64 only)
• Apple Mac OS X 10.4 and 10.5 (Universal Binary)

Public Key Formats

• OpenPGP (RFC 4880)
• X.509 v3

Directory Servers

• LDAP
• PGP Universal Server
• PGP Global Directory
• PGP keyservers

Symmetric Key Algorithms

• AES (up to 256-bit keys)
• CAST5
• TripleDES
• IDEA
• Twofish
• Blowfish*
• Arc4 (128-bit keys)

Hashes

• SHA-1, SHA-256, SHA-384, SHA-512
• MD5
• RIPEMD-160

Public Key Algorithms

• Diffie-Hellman (up to 4096-bit keys)
• DSA (1024-bit keys only, verification up to 3072 bits)
• RSA (up to 4096-bit keys)

Compression Algorithms

• Zip
• BZip2
• ZLib

* Support for Blowfish is limited to decrypting existing messages encrypted with Blowfish or encrypting to existing keys that specify Blowfish as the preferred cipher.