what encryption is used?

File encryption to a *.zen file.... does anybody know the name of the program used to encrypt files to *.ZEN.?

• it was a program I used in 2001 to encrypt some files, and don't remember the name. It encrypted them to *.zen

• Answer:

  ZEN is a directive-based language to specify arbitrarily complex program executions for performance and parameter studies, as well as software testing. ZEN directives are comment lines starting with the ZEN$ prefix and ignored by systems that are unaware of their semantics. Apart from the special characters which mark the beginning (and eventually the end) of a comment, ZEN directives are language independent. Such an approach allows to specify arbitrary value ranges of any problem, system, or machine parameter, including program variables, file names, compiler options, target machines, machine sizes, scheduling strategies, data distributions, etc. ZEN directives can be restricted to arbitrary code regions of any file. The ZEN language defines four types of directives: substitute, assignment, constraint, and performance behaviour. A variable assigned with a set of values (also called value set) within a ZEN substitute or assignment directive is called ZEN variable (e.g., P, STATIC, NUM_THREADS(4), and D -- see Example 1). Large value sets assigned to ZEN variables can be expressed in a very compact form through the usage of ZEN sets . Additionally, value sets are defined as totally ordered sets , where the ordering operation is well defined by the ZEN set specification. ZEN variables can be of type integer, real, or string . The type is determined during the ZEN language compilation phase, based on the value set elements.