1.   Anti-virus programs can quickly scan anything that comes into your computer looking for the unique signature characteristics of known viruses.

2.   A way of creating and verifying a unique signature using cryptography, a branch of applied mathematics dealing with the conversion of messages into unintelligible forms and back again.

3.   Each barcode has a unique digital signature to prevent fraud.

4.   It then marks the segments which are the unique signature of each individual.

5.   Nearly all of them have a unique sonic signature.

6.   That virtually ruled out the pickup theory, because studies of meteorites had shown that extraterrestrial objects tended to have unique isotopic signatures.

7.   The instrument bathes the sample in invisible infrared light, and then looks at the resulting unique molecular signature.

8.   The system provides a unique electronic signature for each unit by matching a specially coded ignition key with a sensor located in each vehicle.

9.   This once-ailing company has undertaken a so-far highly successful effort to re-invent itself and put its own unique signature on the automotive marketplace.

10.   Thousands of silica products each have a unique signature.