Invircible is a unique virus detection application from an Israeli security company called Netz Computing.

Unlike other antivirus software, Invircible is built to protect against all viruses, including viruses for which have not yet been detected. While the generic algorithms upon which it is based does necessitate a slightly more advanced user than that of the average virus scanner, it also affords a much higher level of security. The system uses a sophisticated generic scanner to accomplish a level of security that no other virus scanner matches. Their white paper on the subject provides much more detail. Invircible has found a strong niche market among home, corporate, and governmental organizations for which the need for absolute security is paramount.