Editing Electronic signature (section)

===Biometric signature===

An electronic signature may also refer to electronic forms of processing or verifying identity through the use of biometric "signatures" or biologically identifying qualities of an individual. Such signatures use the approach of attaching some biometric measurement to a document as evidence. Biometric signatures include fingerprints, [[hand geometry]] (finger lengths and palm size), [[iris recognition|iris patterns]], [[speaker recognition|voice characteristics]], retinal patterns, or any other human body property. All of these are collected using electronic sensors of some kind.

Biometric measurements of this type are useless as [[passwords]] because they can't be changed if compromised. However, they might be serviceable, except that to date, they have been so easily deceived that they can carry little assurance that the person who purportedly signed a document was actually the person who did. For example, a replay of the electronic signal produced and submitted to the computer system responsible for 'affixing' a signature to a document can be collected via wiretapping techniques.{{citation needed|date=August 2020}} Many commercially available fingerprint sensors have low resolution and can be deceived with inexpensive household items (for example, [[gummy bear]] candy gel).<ref>{{cite conference |citeseerx=10.1.1.100.8172 |title=Impact of artificial gummy fingers on fingerprint systems |author=Matsumoto |date=2002|book-title=Proceedings of SPIE |pages=275–289}}</ref> In the case of a user's face image, researchers in Vietnam successfully demonstrated in late 2017 how a specially crafted mask could beat [[Apple Inc.|Apple's]] [[Face ID]] on [[iPhone X]].<ref name="BkavBkav17">{{cite web |url=http://www.bkav.com/news-in-focus/-/view_content/content/103968/bkav%E2%80%99s-new-mask-beats-face-id-in-twin-way-severity-level-raised-do-not-use-face-id-in-business-transactions |title=Bkav's new mask beats Face ID in "twin way": Severity level raised, do not use Face ID in business transactions |work=News In Focus |publisher=Bkav Corporation |date=27 November 2017 |access-date=8 May 2018 |archive-date=May 8, 2018 |archive-url=https://web.archive.org/web/20180508221113/http://www.bkav.com/news-in-focus/-/view_content/content/103968/bkav%E2%80%99s-new-mask-beats-face-id-in-twin-way-severity-level-raised-do-not-use-face-id-in-business-transactions |url-status=live }}</ref>