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Oct 03, 2023 167 likes •301 views

Exploring Implicit Memory for Painless Password Recovery Tamara Denning ,* Kevin Bowers,* Marten van Dijk,* Ari Juels* *RSA Laboratories University of Washington Talk Goals Novel authentication concept is not implausible. Future

SLIDE 1

Exploring Implicit Memory for Painless Password Recovery

Tamara Denning,*† Kevin Bowers,* Marten van Dijk,* Ari Juels*

*RSA Laboratories †University of Washington

SLIDE 2

Talk Goals

Novel authentication concept …is not implausible. Future directions identified.

SLIDE 3

The Problem

Authentication

Passwords
Graphical Passwords
Life Questions
Preferences

Password Recovery &

password1

SLIDE 4

Implicit Memory

Unconscious influence Motor memory

Explicit Memory

Conscious retrieval Fact recall Different biological mechanisms

SLIDE 5

Priming

1. Stimulus
2. Time Delay
3. Task

SLIDE 6

System Concept

Primed Enrollment Authentication (Password Recovery)

camel mushroom camel cloud rollerskate fish

Snodgrass & Vanderwart (1980) Snodgrass & Corwin (1988)

SLIDE 7

Authentication Secret

The secret is not the image completion. The secret is the set of assigned images.

SLIDE 8

User Study

1. Stimulus (label complete images)
2. Time Delay (~26.8 days)
3. Task (label fragmented images)

SLIDE 9

User Study

~70 participants
Primed + correctly labeled: 984 / 2149 (45.8%)
Unprimed + correctly labeled: 834 / 2143 (38.8%)

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No memorization required Password strength precisely quantifiable Potentially long-lasting

Strengths & Weaknesses

Slow = weak priming effect

n many images

Limited information per image: correct/incorrect New enrollment required after every use

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Further Investigation

1. The corpus
2. Increase amount of

information per image

SLIDE 12

Questions?

Thanks to study participants from EMC.