jones@herky.cs.uiowa.edu (Douglas Jones) (08/09/88)
If you are interested in the C code for a UNIX utility that implements the data compression and encryption algorithm discussed in the August issue of Communications of the ACM, send me your E-mail and postal address. The utility is patterned after the BSD compress command, and it compresses about as well (sometimes better, sometimes worse, depending on the data being compressed). The code is free to anyone in a research setting, but we are restricting commercial distribution. Douglas W. Jones jones@herky.cs.uiowa.edu
jones@herky.cs.uiowa.edu (Douglas Jones) (12/05/88)
On Aug. 8, 1988, I advertised a UNIX utility based on the data compression scheme I described in the August '88 issue of Communications of the ACM. This utility is patterned after the BSD compress command, and it compresses about as well (sometimes better, sometimes worse, but never as fast); this utility can also be used for encryption, although the degree of security it offers is still unknown. I have found a small number of bugs in the original distribution, and have a repaired version available; again, the code is free to anyone in a research setting. The bugs, incidentally, were found by the stronger than usual type checking and variable use reporting of the hc compiler on the IBM RT; all bugs were in the area of command line parsing and error reporting, none had any effect on the normal functioning of the program. Douglas W. Jones jones@herky.cs.uiowa.edu