Common encryption software wanted

[Frank J. Wancho]

Is it possible to encrypt files on a Unix SYSTEM V machine, then
download and decrypt them on an IBM-PC-compatible machine?  I am aware
of the CRYPT package in Volume 111 of the PC/BLUE collection.
However, I cannot find any information concerning a package using the
same algorithm on the Unix side.  A software DES implementation is
preferred, but any pair of packages will do, either commercial or
"public domain".  Pointers welcome.

Thanks,
Frank