Textual Capth

Textual CAPTCHA

Is CAPTCHA really working?

PRESENTED BY:GEORGIANA FREDERIC ALAJALTOUNI

Summary

What Will You Learn?

Is CAPTCHA really working?

After this Presentation, you will know the following:

• What is a CAPTCHA?
• What different type of CAPTCHA exists?
• Where and How is it used?

INDEX

Video

Introduction

Text + icons

Quote

Audio

Section

Is CAPTCHA really working?

Embedded content

Relevant data

Interactive question

Timeline

Conclusions

Graphic + text

Closure

Table + text

List / process

INTRODUCTION

WHAT IS A CAPTCHA?

CAPTCHA is an acronym for: Completely Automated Public Turing test to tell Computers and Humans Apart.It is used in:Free Email Services Search Engine Bots Worms and Spam Preventing Dictionary Attack

Is CAPTCHA really working?

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LAZY CRYPTOGRAPHERS DOING AI

CAPTCHA VS CRYPTOGRAPHY

"CAPTCHA is a cryptographic protocol whose underlying hardness assumption is based on AI problem." "All we can do is to present evidence that it’s hard to write a program that can pass the test."

Is CAPTCHA really working?

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DEFINITION AND NOTATIONS (1)

VERIFIER/TESTER AND PROVER

V: Verifier/Tester P: Prover, which interacts with V.-equation from p. 4 Succ V, A.. -

Is CAPTCHA really working?

DEFINITION AND NOTATIONS (2)

(α,β)-HUMAN EXECUTBALE

A test V is said to be (α,β)-human executable if at least an α portion of the human population has success greater than β over V.

Is CAPTCHA really working?

DEFINITION AND NOTATIONS (3)

AI PROBLEMS

An AI problem is a triple P = (S,D,f), where S is a set of problem instances, D is a probability distribution over the problem set S, and f : S → {0,1}∗ answers the instances.

Is CAPTCHA really working?

DEFINITION AND NOTATIONS (4)

(α, β, η)-captcha

A (α, β, η)-captcha is a test V that is (α, β)-human executable, and which has the following property:There exists a (δ, τ )-hard AI problem P and a program A, such that if B has success greater than η over V then AB is a (δ,τ) solution to P. I (Here AB is defined to take into account B’s running time too.)

Is CAPTCHA really working?

GAP AMPLIFICATIONS

Any positive gap between the success of humans and current computer programs against a captcha can be amplified to a gap arbitrarily close to 1 by serial repetition. Since captchas involve human use, it is desirable to find the smallest number of repetitions needed in order to make CAPTCHA secure.

PROBLEM FAMILIES

P2

P1

In addition to the distributions I and T , let L be a finite set of “labels”. Let λ : [I] → L compute the label of an image.Define gI,T ,λ so that gI,T ,λ(t(i)) = λ(i). Then P2I,T ,λ = (SI,T , DI,T , gI,T ,λ) consists of writing a program that takes t(i) as input and outputs λ(i).

Consider the following experiment: choose an image i ← I and choose a transformation t ← T ; output t(i). P1I,T consists of writing a program that takes t(i) as input and outputs i (we assume that the program has precise knowledge of T and I).

Is CAPTCHA really working?

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You can add interactivity toyour timeline.

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The important thing is that everything fitsthe theme.

Also animations to make it fun.

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Telling stories with order and hierarchyis essential.

And leave your audience speechless.

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Icons are alwaysgood allies.

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SUBTÍTULO AQUÍ

THE Use visuals inyour presentation...

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Graphics are highly shareable, making them ideal for social media. And as if that weren't enough, they usually generate high-quality traffic to the content we create.

Usage of CAPTCHA THROUGHOUT THE YEARS

Use tablesand infographics

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Visual communication is a key tool. It is easier for us to 'read' images than to read written text. That is why disciplines like Visual Thinking facilitate visually rich note-taking through the use of images, graphs, infographics, and simple drawings.

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02

03

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We are visual beings. We are capable of understanding images from millions of years ago, even from other cultures.

Narrative beings. We tell thousands and thousands of stories. 2/3 of our conversations are stories.

Social beings. We need to interact with each other. Welearn collaboratively.

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01

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Social beings. We need to interact with each other. We learn collaboratively.

We are visual beings. We are able to understand images from millions of years ago, even from other cultures.

Contextualize Your Topic with a Subtitle

TITLE HERE

TITLE HERE

04

02

SUBTITLE HERE

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Digital beings. We avoid being part of the content saturation in the digital world.

Narrative beings. We tell thousands and thousands of stories. 2/3 of our conversations are stories.

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Make your audience remember the message

Generate experiences with your content.

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Has an amazing effect. Very WOW.

Activate and amaze your audience.

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It has a WOW effect. Very WOW.

Activate and amaze your audience

Contextualize Your Topic with a Subtitle

TITLEHERE

TITLEHERE

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Set up aflow throughthe content.

Define secondary messages with interactivity.

Hierarchize and givevisual weight tothe main element.

Planning the structureof your communication.

Embedded content

Map

Social Media

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Music

Interactive question

Write an awesome subtitle

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+INFO

Video about why CAPTCHAs are getting harder (Link in wtsp)

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Conclusions

A great presentation...

• Represent data with graphics
• Use timelines
• It is animated and interactive
• Excites the brain
• DO NOT exceed with bullet points

• Is clear and structured
• Tells stories hierarchically
• Matches your audience
• Adapts fonts and colors to the theme
• Includes images and entertains

Describe the problem you’re going to resolve and, above all, the reason why your idea is interesting

THANK YOU!

Did you know...

We retain 42% more information when the content moves? It is perhaps the most effective resource to capture the attention of your audience.

With this function...

You can add additional content that excites the brain of your audience: videos, images, links, interactivity... Whatever you want!

Did you know...

The window allows you to add more extensive content. You can enhance your genially by incorporating PDFs, videos, text... The content of the window will appear when clicking on theinteractive element.

Tip:

Interactivity is the key element to capture the interest and attention of your audience. A genially is interactive because your audience explores and engages with it.

XXXX

You can add additional content that excites your audience's brain: videos, images, links, interactivity... Whatever you want!

Write an awesome headline

Contextualize your topic with a subtitle

What you are reading: interactivity and animation can make the most boring content become something fun. In Genially, we use AI (Awesome Interactivity) in all our designs, so that you level up with interactivity and turn your content into something that adds value and engages.When giving a presentation, there are two objectives to pursue: conveying information and avoiding yawns. To achieve this, it may be a good practice to create an outline and use words that will be etched into the brains of your audience.

With Genially templates, you can include visual resources to leave your audience in awe. You can also highlight specific phrases or data that will be engraved in the memory of your audience and even embed external content that surprises: videos, photos, audios... Whatever you want!Do you need more reasons to create dynamic content? Well: 90% of the information we assimilate comes to us through sight, and we retain 42% more information when thecontent moves.

Watch out!

In Genially we use AI (Awesome Interactivity) in all our designs, so that you level up with interactivity and turn your content into something that adds value and hooks.

With this function...

You can add additional content that excites your audience's brain: videos, images, links, interactivity... Whatever you want!

Write an awesome headline

An awesome presentation...

• Represent data with graphics.

• Use timelines.
• It is animated and interactive.
• Excite the brain through multimedia elements.
• DO NOT go overboard with bullet points 🙃​.

• It is clear and structured
• It tells stories hierarchically.
• It matches your audience.
• It adapts fonts and color to the theme.
• It includes images and entertains.

With this function...

With this function... You can add additional content that excites your audience's brain: videos, images, links, interactivity...Whatever you want!

Tip:

Interactivity is the key element to capture the interest and attention of your audience. A genially is interactive because your audience explores and interacts with it.

Did you know...

In Genially you will find more than 1,000 templates ready to pour your content and 100% customizable, that will help you tell your stories.

Tip:

The emotional connection or engagement with your content increases when you manage to make your audience identify with the message you want to transmit.

Write an awesome headline

An awesome presentation...

• Represent data with graphics.

• Use timelines.
• It is animated and interactive.
• Excite the brain through multimedia elements.
• DO NOT go overboard with bullet points 🙃​.

• It is clear and structured
• It tells stories hierarchically.
• It matches your audience.
• It adapts fonts and color to the theme.
• It includes images and entertains.

XXXX

Warning! In Genially we use AI (Awesome Interactivity) in all our designs, so you can level up with interactivity and turn your content into something that adds valueand engages.

Did you know that...

In Genially you will find over 1,000 templates ready to showcase your content and 100% customizable, which will help you tellyour stories?

XXXX

You can add additional content that excites the minds of your audience: videos, images, links, interactivity... Whatever you want!

Did you know...

In Genially you will find more than 1,000 templates ready to pour your content and 100% customizable, that will help you tell your stories.

XXXX

Did you know that... We retain 42% more information when the content is moving? It is perhaps the most effective resource to capture your audience's attention.

Did you know that...

We retain 42% more information when the content moves? It may be the most effective resource to capture your audience's attention.

XXXX

¡Beware! In Genially, we use AI (Awesome Interactivity) in all our designs, so you can level up with interactivity and transform your content into something that adds value and hooks.

XXXX

Did you know that... We retain 42% more information when the content moves? It is perhaps the most effective resource to capture the attention of your audience.

Write an awesome headline

A great presentation...

• Represent data with graphics.

• Use timelines.
• It's animated and interactive.
• Excite the brain through multimedia elements.
• DO NOT exceed with bullet points 🙃​.

• It is clear and structured
• It tells stories hierarchically.
• It matches your audience.
• It adapts fonts and colors to the theme.
• It includes images and entertains.