Authentication
Videos
Authentication is the act of proving an assertion, such as the identity of a computer system user. In contrast with identification, the act of indicating a person or thing's identity, authentication i
ATM user authenticating himself
A security hologram label on an electronics box for authentication
A military police officer checks a driver's identification card before allowing her to enter a military base.
NSA KAL-55B Tactical Authentication System used by the U.S. military during the Vietnam War – National Cryptologic Museum
Digital watermarking
Videos
A digital watermark is a kind of marker covertly embedded in a noise-tolerant signal such as audio, video or image data. It is typically used to identify ownership of the copyright of such a signal. D
Fictious example of a digital watermark with the words "STOCK PHOTO" on an image of Todd Graham
