Follow-Up: Loss of Digital Wallet

Hitoshi Kokumai
2 min readFeb 3, 2021


I found the source

for my previous post — “Loss ofCryptocurrency’s Digital Wallet

It reads “Of the existing 18.5 million Bitcoin, around 20 percent — currently worth around $140 billion — appear to be in lost or otherwise stranded wallets.”, which makes me cry “Invest a tiny fraction of that amount in our project and you will see the evaporation plunge into a dive straight away!”

Actually, 1/100,000 of US$140 billion would be large enough for us to complete the image-to-code converter software module for re-generating passwords and private keys of digital wallets on the fly from our episodic image memory.

Societally, the ROI won’t be small.

* Protection against lost passwords is one thing. Protection against lost hardware is something else. Protection against lost passwords and lost hardware concurrently is yet another. Our solution is for the last.

** Protection against loss is one thing. Protection against theft is something else. Protection against loss and theft concurrently is yet another. Our solution is for the last.

< References >

Summary and Brief History — Expanded Password System

Image-to-Code Conversion by Expanded Password System

Proposition on How to Build Sustainable Digital Identity Platform

External Body Features Viewed as ‘What We Are’

History, Current Status and Future Scenarios of Expanded Password System

Negative Security Effect of Biometrics Deployed in Cyberspace

Removal of Passwords and Its Security Effect

Availability-First Approach

Update: Questions and Answers — Expanded Password System and Related Issues (30/June/2020)

< Videos on YouTube>

Slide: Outline of Expanded Password System (3minutes 2seconds)

Demo: Simplified Operation on Smartphone for consumers (1m41s)

Demo: High-Security Operation on PC for managers (4m28s)

Demo: Simple capture and registration of pictures by users (1m26s)

Slide: Biometrics in Cyber Space — “below-one” factor authentication

< Latest Media Articles Published in 2020 Spring>

Digital Identity — Anything Used Correctly Is Useful

‘Easy-to-Remember’ is one thing ‘Hard-to-Forget’ is another



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.