We have been tossing around an idea that would code email text into \na PDF417 or N4469P barcode where we can stuff 8K of data. Would\nappreciate comments. \n\nYou type text and a proprietary program converts the text into a \nvisible barcode that is, preferably, not viewed as an attachment \n(just a PGP is not seen as an attachment). \n\nSend the email and either once received, the recipient induces the \nprogram that would automatically decode the barcode into standard, \nreadable text or the barcode would self-decode. In transit, the \nbarcode would not be readable since it was encoded with the program \nand its secret internal Huffman-Silverstein coding. \n\nThe advantage here is that 8K of text would be in a portable \ndocument file. That file could become a secure credential and \ntransported with ease and inexpense or passed through email. \n\nPlease, take your best shots here.