PGP already lets you do almost what you want. The pgp -c option does conventional crypto, using IDEA, and prompts you for a passphrase to encrypt it with. (You can look at the code to see if it crunches it with MD5 or just uses the first 16 bytes / 128 bits.) To decrypt, you just do pgp -d filename. This lets anybody who has the PGP binaries on their machine decrypt it, even if they haven't bothered setting up public and private keys. If they use DOS, and either you're located in an encryption-tolerant country or they're located in your country, you can send them the binary if they want. If this is too big, you can shred apart the PGP source and do a version with just the IDEA decryption stuff, leaving out the patent-sensitive RSA code and most of the fancy help and file-handling stuff. Of course, if you *still* really want something that's widely executable for people who don't want to install crypto code on their machines, you could write yourself an IDEA-decryptor in PostScript (tm) and let them print the file on their laser printer. A tad slow, but...... (Yes, they'll need some way to input the passphrase; editing the file works but leaves traces around. You'll think of something user-friendly if you're that perverse :-) Bill # Bill Stewart AT&T Global Information Solutions, aka NCR Corp # 6870 Koll Center Parkway, Pleasanton CA, 94566 Phone 1-510-484-6204 fax-6399 # email bill.stewart@pleasantonca.ncr.com billstewart@attmail.com # ViaCrypt PGP Key IDs 384/C2AFCD 1024/9D6465