Per suggestions received for this project, I've added code to "pad" 8th bits in a "7-bit" text file, i.e., to "normalize" the ratio of zero-bits and one-bits somewhat. Bit-padding prior to encryption does not change the central imperative of the program, which is to never change any bits in a file, since bit-padding is a separate option. Attached are: CCRP.H ('C'-language header) CCRP.C ('C'-language code) CCRP.DOC (instructions) CCRP.FAQ (f.a.q.) Suggested procedure: Start with any file; if "7-bit" ASCII, try bit-padding first. Next, perform encryption at least half a dozen times, with different pass-phrases. To decrypt, perform all steps in reverse, per documentation. Comments and questions are welcome.