Some More Topics on Digital Identity #9

Hitoshi Kokumai
2 min readDec 23, 2022

Surprisingly many people are promoting, selling and adopting biometrics as a tool of identity authentication without the basic knowledge of the very technology.

Get graphs to talk the nature of biometrics

- By nature, whether static or behavioural, all the biometrics technologies are ‘probabilistic’ since it measures unpredictably variable body features of living animals in ever changing environments.

- False Acceptance and False Rejection are not the variables that are independent from each other, but are dependent on each other.

- The lower a False Acceptance Rate is, the higher the corresponding False Rejection Rate is. The lower a False Rejection Rate, the higher the corresponding False Acceptance Rate.

- When a False Acceptance Rate is close to Zero, the corresponding False Rejection Rate is close to One (100%). When a False Rejection Rate is close to Zero, the corresponding False Acceptance Rate is close to One (100%).

- The presence of False Rejection, however close to Zero, would require a fallback means against the False Rejection unless the user can forget the availability.

Ref: “I support Biometrics as a Technology” https://www.linkedin.com/posts/hitoshikokumai_democracy-privacy-ethics-activity-6993771041974095872-2eOx

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As an appendix to the series of ‘Identity Assurance by Citizens’ Non-Volatile Autobiographic Memory #1 — #19’, I am discussing some more topics on digital identity. It may well tell much more about the very broad scope of our activity

*P34 of “Fend Off Cybercrime with Episodic Memory”

https://www.slideshare.net/HitoshiKokumai/slide-share-updated-fend-off-cybercrime-with-episodic-memory-29aug2022

Video: https://drive.google.com/file/d/1FEYKjBOEVXVEljRt2_nu1uSXvtUNN73Q/view

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Hitoshi Kokumai

Advocate of ‘Identity Assurance by Our Own Volition and Memory’, Inventor of Expanded Password System and Founder of Mnemonic Identity Solutions Limited in UK.