Death rays from Mars made jpp@software.net (John Pettitt) write:

CP Backup (part of PC Tools for Central Point aka Symantec) has DES. As to how good the implementation is: I have no idea.

It's slightly more secure than the widespread double rot-13 encryption. PC Tools uses 2-round DES (or at least it did the last time I looked). There's some criticism of this in the SFS docs somewhere. Peter.