Authentication methods

A seal is a device for making an impression in wax, clay, paper, or some other medium, including an embossment on paper, and is also the impression thus made.

Identification, friend or foe (IFF) is an identification system designed for command and control.

Extensible Authentication Protocol, or EAP, is an authentication framework frequently used in wireless networks and point-to-point connections.

A kaō or huāyā is a stylized signature or a mark used in east Asia in place of a true signature.

A smart card, chip card, or integrated circuit card (ICC) is any pocket-sized card that has embedded integrated circuits.

A digital watermark is a kind of marker covertly embedded in a noise-tolerant signal such as an audio, video or image data.

A one-time password (OTP) is a password that is valid for only one login session or transaction, on a computer system or other digital device.

Authentication (from Greek: αὐθεντικός authentikos, "real, genuine", from αὐθέντης authentes, "author") is the act of confirming the truth of an attribute of a single piece of data (a datum) claimed true by an entity.

A biometric passport, also known as an e-passport, ePassport or a digital passport, is a combined paper and electronic passport that contains biometric information that can be used to authenticate the identity of travelers.

Password strength is a measure of the effectiveness of a password in resisting guessing and brute-force attacks.

An electronic signature, or e-signature, refers to data in electronic form, which is logically associated with other data in electronic form and which is used by the signatory to sign.

Automatic number plate recognition (ANPR; see also below) is a technology that uses optical character recognition on images to read vehicle registration plates.

Below are listed various examples of words and phrases that have been identified as shibboleths, a word or custom whose variations in pronunciation or style can be used to differentiate members of ingroups from those of outgroups.

The FIDO ("Fast IDentity Online") Alliance is an industry consortium launched in February 2013 to address the lack of interoperability among strong authentication devices and the problems users face creating and remembering multiple usernames and passwords.

Handwritten biometrics can be split into two main categories: Static: In this mode, users writes on paper, digitize it through an optical scanner or a camera, and the biometric system recognizes the text analyzing its shape.

The Malaysian identity card (Malay: kad pengenalan Malaysia), is the compulsory identity card for Malaysian citizens aged 12 and above.

In computer security, logging in, (or logging on or signing in or signing on), is the process by which an individual gains access to a computer system by identifying and authenticating themselves.

Microprinting is the production of recognizable patterns or characters on a printed medium at a scale which requires magnification to be read.