This is PGP 5.0, a significant step forward from 2.6.*
CHANGES:
There are a number of large changes from the 2.6.2 distribution. Most
notable is that the command line has changed substantially. See
the pgp(1) man page for a discussion of how to use the new command
line.
Also, to allow easy interoperation with older versions on the same
system, a number of filename changes have been made.
NEW FEATURES:
PGP 5.0 contains support for new encryption methods (most notably
DSS/Diffie-Hellman), and built-in keyserver support. Also, the
command line has been redesigned to be more Unix and scripting
friendly.
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