Hitoshi Kokumai

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Nonpredictable Passwords Carried Around on Memo

Memo with a Password written on it

Device with a Password stored on it

Is it correct to handle them as 'What We Know’
like "Remembered Password’?

I got interested in this article -on the password problem  “Tech Q&A”     https://www.unionleader.com/nh/lifestyles/tech-q-a-safeguarding-against-password-hackers/article_16d3629e-b5ba-550b-b2ac-6070403f61a4.html

Their answer is “The best defense against brute force and dictionary attacks is to use a password that is a long combination of letters, numbers and symbols that would be meaningless to anyone but you. These so-called “nonpredictable passwords” are far more difficult to hack.”

It would be fine for you if you are confident you are always able to recall all of them along with the correspondence with all the accounts to use these passwords for under any circumstances.  Then, you would not have to carry around a memo on which all the accounts and corresponding passwords are written down; the memo would work as a single point of failures and vulnerabilities.

Should you be not so certain about your such ability, you might be interested in our password discussions such as “Dual Causes of Password Predicament” 

and “Password Manager or Expanded Password System”  

“Expanded Password System

wane = Only I can select all of
BS] them correctly

Broader choices with both images and characters accepted






Easy to manage relenons between accounts and corresponding passwords.


Torturous login is history. Login is now comfortable, relaxing and healing


Key References 

 Bring a healthy second life to legacy password systems

For Achieving Solid Digital Identity on Information Security Buzz (Mar/2021)

What We Know for Certain about Authentication Factors

Digital Identity for Global Citizens

Image-to-Code Conversion by Expanded Password System

Summary and Brief History - Expanded Password System

Proposition on How to Build Sustainable Digital Identity Platform

Account Recovery with Expanded Password System

Relation of Accounts & Passwords


* Unique matrices of images allocated to different accounts.

+ Ata glance you will immediately realize what images you should pick
up as your passwords for this or that account.

Additional References

Removal of Passwords and Its Security Effect

Step-by-Step Analysis of Why and How Biometrics Brings Down Security

Negative Security Effect of Biometrics Deployed in Cyberspace

External Body Features Viewed as ‘What We Are’

 History, Current Status and Future Scenarios of Expanded Password System

Availability-First Approach

Update: Questions and Answers - Expanded Password System and Related Issues 

Ifonlytextand fare OK [SUV BIOKUW

to memonze
text/number passwords

{Text Mode)
Recall the remembered

J 2


<veco N=

Ox ma

XxXBFr mow



Low memory ceiling

to lighten the load of

text passwords


{Graphics Mode)
Recognize the pictures
remembered mn stones


High memory ceiling



to make use of
memorized images

{Ongimal Picture Mode)

Recognize the unforgettable
pictures of episodic memories

sRBO yr
L@ S00




Very high memory cuiding

— Think ofall those adders you have to climb in Donkey Kong 1+)


 < Videos on YouTube>

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

Digital Identity for Global Citizens (10minutes - narrated)

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

Secret Credenti



Episodic Memory
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