Autoencryption Hear it!

Autoencryption (virus) Hacker Definition
How a virus encrypts—or codifies—all or part of itself. When this occurs, a virus scanner or an analyst will find it more difficult to detect or to analyze.
Wickham Enterprises. Multi-Function Printer.com. [Online, 2005.] http://www.multifunction-printer.com/virus_glossary/.