14. Misc topics (2)

Deadline: February 3rd (2023/2/3)

Today's topics

Bret Victor

Visual authentication

Digital signage

Trends and summary

https://vimeo.com/66085662

http://gyazo.com/51e3e96756bf618c25c3184077bae675.png

Lecture at Stanford

https://www.youtube.com/watch?v=ef2jpjTEB5U

Visual authentication

Use visual representations for authentication

http://gyazo.com/38a52f9d4f2c67eaf6f6cc7acdf3e13e.png

Why authentication is important these days

Age of ubiquitous computing

Everybody uses computers everywhere

Various computers are shared

Authentication required

Authentication methods

Use what people have

Keys, USB memories

Use what people are like

Bio authentication

Use what people know

Passwords, challenge questions

Use what people can do

CAPTCHA

Web page authentication

Mostly password-based

Visual authentication

Password-based authentication

Easy to implement

No special technology required

Useful on PCs

Keyboards are always available

Safe if properly managed

Problems of passwords

Difficult to select a good password

Difficult to remember

Easy to forget

Easy to attack

Difficult operation

Easy to copy

Character input device required

Problems of authentication hardware

Should be carried all the time

Easily forget to carry

Theft risks

Problems of bio authentication

Vulnerable to injury and sickness

Can be copied

No modification possble

What is the ultimate authentication method?

For everyone

Everywhere

Easy

Safe

No device

Feel safe

Prerequisites

Only use brain power

Knowledges, abilitys

Only proper user can execute

Use episodic memories

Episodic memories

Everyonen has episodic memories

Never forget

Not guessable from others

Impossible to copy

c.f. Semantic memory

Using images for authentication

Episodic memories are often image-related

Using episodic image memories for authentication

DéjàVu

Selecting images for authentication

http://gyazo.com/38a52f9d4f2c67eaf6f6cc7acdf3e13e.png

Selecting faces

http://gyazo.com/918210f59d3892b2acdeb7aa276e9863.png

PassPoints

http://gyazo.com/eb52cc445b41c141dae0c2425b962d19.png

Difficult to remember?

People tend to select similar points

Select special points

http://gyazo.com/2dbb4edc510938f3f23a0811e6b12ea6.png

Select categories

OpenIDに対応

http://gyazo.com/a5e94fe05d651e09b942566eba50684b.png

Recall-A-Story

http://gyazo.com/80cf70536ce29eb3e8afcde8e93f30f6.png

Select images based on a story

Maybe difficult to remember the story

Easy to forget

Nishigaki's method

http://gyazo.com/fe506a9fca9f94f2553897cd9767c988.png

Select an image from unclear images

Wiedenbeck method

http://gyazo.com/351a3b2722a7f524c2271812f07308c5.png

Select multiple points which surround the image

Quiz-based image authentication

Create quizes from episodic memories

Authenticationi success after right selection

http://gyazo.com/0cc5ab89130f083b358e70cc3edebe36.png

Demo: Quiz-based image authentication

Creating Q/A pairs

Advantages of quiz-based authentication

Never forget

Easy to handle

Authentication level can be chnged

Used by group of people

Beautiful design possible

Using beautiful images

http://gyazo.com/ca70afc60ec5218224c483e7c8ea46c2.png

Prolems of quiz-based authentication

Difficult to prepare images

Images are sometimes found on the net

Users feel unsafe

"Human-crypt" by Prof. Imai

Thinking about authentication from global viewpoint

Important, but not popular

Required technologies

How people can trust the system

Security evaluation

Create passwords from quizes

No effort for remembering passwords

https://gyazo.com/b115430b2510bf23942be7463578ac9b

Using EpisoPass (EpisoDAS)

https://gyazo.com/117ce9636570a37c9a7553f4db167622

DAS

Use a drawing patter for authentication

https://gyazo.com/dad44e73b739a76973672b1dedd25659

Demo: EpisoPass

Digital signage

Found in many stations

http://gyazo.com/8d2338a9b2cfd26086db1e0dba84124a.png

Digital signages in Seoul

http://gyazo.com/f4d9fa68059981201320cdd912c16030.png

Future of digital signage

Interactivity

Universal design

Connection with smartphones

Simple and useful visualization techniques required

Summary and trends of visualization

Few new novel methods

New methods are usually complicated

People can only understand simple visualizations

Old simple methods became popular

Promising methods

Scrollytelling

Getting popular because interaction is simple

Zooming interfaces

Visualization for specific areas

Finance companies

Bio companies

JavaScript-based tools

Services on the Web

For "business intelligence"

Deadline: February 3rd (2023/2/3)

End