The data format was proprietary, and was scrambled so the barcode data could not be read as plain text. However, the barcode itself is closely related to Code 128, and the scanner was also capable of reading EAN/UPC and other symbologies. Because of the weak obfuscation of the data, meant only to protect the company under DMCA guidelines (like the DVD protection Content Scramble System), the software for decoding the CueCat's output quickly appeared on the Internet, followed by a plethora of unofficial applications.