The document discusses CAPTCHA (Completely Automated Public Turing Test to Tell Computers and Humans Apart). It provides a brief history of CAPTCHAs, describes different types including text, graphics, and audio-based CAPTCHAs. Applications of CAPTCHAs include preventing automated actions on email services and dictionary attacks. The document also covers processes used in CAPTCHAs, techniques for breaking CAPTCHAs, improvements like reCAPTCHA, potential benefits and drawbacks.
CAPTCHA- Newly Attractive Presentation for YouthWebCrazyLabs
A CAPTCHA is a program that protects websites against bots by generating and grading tests that humans can pass but current computer programs cannot.
It is used, commonly, to protect your sites.
CAPTCHA- Newly Attractive Presentation for YouthWebCrazyLabs
A CAPTCHA is a program that protects websites against bots by generating and grading tests that humans can pass but current computer programs cannot.
It is used, commonly, to protect your sites.
A seminar of CAPTCHA
/* A very kind request to the viewers, please don't try to download it and just edit the name. Just take the idea from the presentation and add your innovation to it */
I hope it will be helpful to you all :)
Good Luck :)
What Is Artificial Intelligence? | Artificial Intelligence For Beginners | Wh...Simplilearn
This Artificial Intelligence presentation will introduce you to the AI world and give you a short glimpse about AI history. By the end of this video, you will learn what is Artificial intelligence, types of Artificial Intelligence, applications of Artificial Intelligence and future of Artificial Intelligence.
The topics covered in this presentation are as follows:
1. Brief History of Artificial Intelligence
2. What is Artificial intelligence
3. Types of Artificial Intelligence
4. Applications of Artificial Intelligence
5. Future of Artificial Intelligence
-----------------------------------------------------------------------------------------
Simplilearn’s Artificial Intelligence course provides training in the skills required for a career in AI. You will master TensorFlow, Machine Learning and other AI concepts, plus the programming languages needed to design intelligent agents, deep learning algorithms & advanced artificial neural networks that use predictive analytics to solve real-time decision-making problems without explicit programming.
Why learn Artificial Intelligence?
The current and future demand for AI engineers is staggering. The New York Times reports a candidate shortage for certified AI Engineers, with fewer than 10,000 qualified people in the world to fill these jobs, which according to Paysa earn an average salary of $172,000 per year in the U.S. (or Rs.17 lakhs to Rs. 25 lakhs in India) for engineers with the required skills.
You can gain in-depth knowledge of Artificial Intelligence by taking our Artificial Intelligence certification training course. Those who complete the course will be able to:
Master the concepts of supervised and unsupervised learning
Gain practical mastery over principles, algorithms, and applications of machine learning through a hands-on approach which includes working on 28 projects and one capstone project.
Acquire thorough knowledge of the mathematical and heuristic aspects of machine learning.
Understand the concepts and operation of support vector machines, kernel SVM, naive bayes, decision tree classifier, random forest classifier, logistic regression, K-nearest neighbors, K-means clustering and more.
Comprehend the theoretical concepts and how they relate to the practical aspects of machine learning.
Be able to model a wide variety of robust machine learning algorithms including deep learning, clustering, and recommendation systems
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Deep Learning - The Past, Present and Future of Artificial IntelligenceLukas Masuch
In the last couple of years, deep learning techniques have transformed the world of artificial intelligence. One by one, the abilities and techniques that humans once imagined were uniquely our own have begun to fall to the onslaught of ever more powerful machines. Deep neural networks are now better than humans at tasks such as face recognition and object recognition. They’ve mastered the ancient game of Go and thrashed the best human players. “The pace of progress in artificial general intelligence is incredible fast” (Elon Musk – CEO Tesla & SpaceX) leading to an AI that “would be either the best or the worst thing ever to happen to humanity” (Stephen Hawking – Physicist).
What sparked this new hype? How is Deep Learning different from previous approaches? Let’s look behind the curtain and unravel the reality. This talk will introduce the core concept of deep learning, explore why Sundar Pichai (CEO Google) recently announced that “machine learning is a core transformative way by which Google is rethinking everything they are doing” and explain why “deep learning is probably one of the most exciting things that is happening in the computer industry“ (Jen-Hsun Huang – CEO NVIDIA).
A seminar of CAPTCHA
/* A very kind request to the viewers, please don't try to download it and just edit the name. Just take the idea from the presentation and add your innovation to it */
I hope it will be helpful to you all :)
Good Luck :)
What Is Artificial Intelligence? | Artificial Intelligence For Beginners | Wh...Simplilearn
This Artificial Intelligence presentation will introduce you to the AI world and give you a short glimpse about AI history. By the end of this video, you will learn what is Artificial intelligence, types of Artificial Intelligence, applications of Artificial Intelligence and future of Artificial Intelligence.
The topics covered in this presentation are as follows:
1. Brief History of Artificial Intelligence
2. What is Artificial intelligence
3. Types of Artificial Intelligence
4. Applications of Artificial Intelligence
5. Future of Artificial Intelligence
-----------------------------------------------------------------------------------------
Simplilearn’s Artificial Intelligence course provides training in the skills required for a career in AI. You will master TensorFlow, Machine Learning and other AI concepts, plus the programming languages needed to design intelligent agents, deep learning algorithms & advanced artificial neural networks that use predictive analytics to solve real-time decision-making problems without explicit programming.
Why learn Artificial Intelligence?
The current and future demand for AI engineers is staggering. The New York Times reports a candidate shortage for certified AI Engineers, with fewer than 10,000 qualified people in the world to fill these jobs, which according to Paysa earn an average salary of $172,000 per year in the U.S. (or Rs.17 lakhs to Rs. 25 lakhs in India) for engineers with the required skills.
You can gain in-depth knowledge of Artificial Intelligence by taking our Artificial Intelligence certification training course. Those who complete the course will be able to:
Master the concepts of supervised and unsupervised learning
Gain practical mastery over principles, algorithms, and applications of machine learning through a hands-on approach which includes working on 28 projects and one capstone project.
Acquire thorough knowledge of the mathematical and heuristic aspects of machine learning.
Understand the concepts and operation of support vector machines, kernel SVM, naive bayes, decision tree classifier, random forest classifier, logistic regression, K-nearest neighbors, K-means clustering and more.
Comprehend the theoretical concepts and how they relate to the practical aspects of machine learning.
Be able to model a wide variety of robust machine learning algorithms including deep learning, clustering, and recommendation systems
-----------------------------------------------------------------------------------------
Deep Learning - The Past, Present and Future of Artificial IntelligenceLukas Masuch
In the last couple of years, deep learning techniques have transformed the world of artificial intelligence. One by one, the abilities and techniques that humans once imagined were uniquely our own have begun to fall to the onslaught of ever more powerful machines. Deep neural networks are now better than humans at tasks such as face recognition and object recognition. They’ve mastered the ancient game of Go and thrashed the best human players. “The pace of progress in artificial general intelligence is incredible fast” (Elon Musk – CEO Tesla & SpaceX) leading to an AI that “would be either the best or the worst thing ever to happen to humanity” (Stephen Hawking – Physicist).
What sparked this new hype? How is Deep Learning different from previous approaches? Let’s look behind the curtain and unravel the reality. This talk will introduce the core concept of deep learning, explore why Sundar Pichai (CEO Google) recently announced that “machine learning is a core transformative way by which Google is rethinking everything they are doing” and explain why “deep learning is probably one of the most exciting things that is happening in the computer industry“ (Jen-Hsun Huang – CEO NVIDIA).
Overview of the Domain Name System (DNS).
In the early days of the Internet, hosts had a fixed IP address.
Reaching a host required to know its numeric IP address.
With the growing number of hosts this scheme became quickly awkward and difficult to use.
DNS was introduced to give hosts human readable names that would be translated into a numeric IP addresses on the fly when a requesting host tried to reach another host.
To facilitate a distributed administration of the domain names, a hierarchic scheme was introduced where responsibility to manage domain names is delegated to organizations which can further delegate management of sub-domains.
Due to its importance in the operation of the Internet, domain name servers are usually operated redundantly. The databases of both servers are periodically synchronized.
We all use Wifi today. You know how much money it saves for your smart-phone data usage band-width. Connecting all your computers and gadgets with cables is not just history, even if you attempt it would be impractical!
Wifi being so pervasive, also brings along tremendous security implications. Come join us to look into details of Wifi security. How to secure your wifi network? How certain wifi encryption technologies can be hacked? We would prove that with live demos!
Join us to reflect on the security aspect of this technology, discuss about it and leave with more confidence about how 'secure' your WiFi access is?
Enhancing Web-Security with Stronger CaptchasEditor IJCATR
Captcha are used widely over the World Wide Web to prevent automated programs in order to scrape a data from
websites. Captcha is a challenge response test used to ensure that the response is generated by a person not by a computer. Users
are asked to read and type a string of distorted characters in order to ensure that the user is human or not. Automation is real
problem for web application. Automated attacks can exploit many services:
1. Blogs 2. Forums 3. Phishing 4. Theft of data
Registration Websites use CAPTCHA (completely automated public turing test to tell computers and human apart) systems to
prevent the bot programs from wasting their resources. Today is the Era of where technologies are changes very rapidly. So
spammers are hackers are also trying something new to cracking captcha. That’s why it is necessary to developing an advanced
technology to generating a captcha. Just like simply generating a Captcha Images from text, or rotating an object within images.
in this captcha report, you get everything those you need in a seminar. hope you like this report..
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Completely Automated Public Turing test to tell Computers and Humans Apart.
Captcha word comes from capture.
First developed by Alta Vista in 1997.
The term coined in 2000 at CMU(Carnegie mellon university) by Luis von Ahn, Manuel Blum, Nicholas J. Hopper & John Langford.
I present a new security primitive based on hard AI problems, namely, a novel family of graph-ical password systems built on top of Captcha technology, which we call Captcha as graphical passwords (CaRP). CaRP is both a Captcha and a graphical password scheme. CaRP addresses a number of security problems altogether, such as online guessing attacks, relay attacks, and, if combined with dual-view technologies, shoulder-surfing attacks. Notably, a CaRP password can be found only probabilistically by automatic online guessing attacks even if the password is in the search set. CaRP also offers a novel approach to address the well-known image hotspot problem in popular graphical password systems, such as PassPoints, that often leads to weak password choices. CaRP is not a panacea, but it offers reasonable security and usability and appears to fit well with some practical applications for improving online security.
The most notable primitive invented is Captcha, which distinguishes human users from computers by presenting a challenge, i.e., a puzzle, beyond the capability of computers but easy for humans. Captcha is now a standard Internet security technique to protect online email and other services from being abused by bots.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
3. What is CAPTCHA??
CAPTCHA (Completely Automated Public Turing
Test To Tell Computers and Humans Apart).
The P for Public means that the code and the
data used by a CAPTCHA should be publicly
available.
T for “Turing Test to Tell” is because
CAPTCHAs are like Turing Tests.
4. What is CAPTCHA??
Continues…
Captcha is a program that protect website
against bots by generating and grading test
that
-Human can pass
but
-Computer program can’t
5. What is CAPTCHA??
Continues…
Captcha requires that the user types letters
or digits from distorted image appears on
screen.
If correct solution is entered than system
assumes that response is generated
-by user.
else
-by bots & access denied.
6. What is CAPTCHA??
Continues…
Standard Interpretation
player C, the interrogator,
is tasked with trying to
determine which player
- A or B - is a computer and
which is a human.
7. History behind CAPTCHA
Captcha word comes from capture.
it is also known as reverse turing test.
About 200 million CAPTCHAs are solved by humans
around the world every day.
First developed by Alta Vista in 1997.
The term coined in 2000 by Luis von Ahn, Manuel
Blum and Nicholas j. Hopper of Carnegie Mellon
university and john Langford of IBM.
8. Types of CAPTCHA
Text Based CAPTCHA
Gimpy,ez-gimpy
Gimpy-r, Google CAPTCHA
Simard’s HIP
Graphics Based CAPTCHA
Bongo
Pix
Audio Based CAPTCHA
9. Text Based CAPTCHA
Gimpy
Initially used by yahoo ,in this CAPTCHA two steps are
followed as:
a) Pick a word or words from a small dictionary
b) Distort them and add noise and background
10. Text Based CAPTCHA
Gimpy-R
This was used by google and was basically a simple
advance over gimpy. Here instead of a complete
word individual letters are noised instead of
complete words. steps followed are as:
a) Pick random letters
b) Distort them, add noise and background
Type three words appearing in the image.
11. Text Based CAPTCHA
Simcard’s
Here further advances made and arcs being made
into it ie. Curved geometrical shapes. Hence steps
followed are as:
a)Pick random letters and numbers
b)Distort them and add arcs
12. Some Screenshots of
Text Based CAPTCHA
Pictures of CAPTCHA
implemented by some popular
websites.
13. Graphics Based CAPTCHA
Bongo
Following steps are followed in
BONGO CAPTCHAS as:
a)Display two series of blocks
b)User must find the characteristic
that sets the two series apart
c)User is asked to determine which
series each of four single blocks
belongs to. To which side does the block
on the bottom belong?
14. Graphics Based CAPTCHA
Continues…
Pix
This is the second kind of graphics
CAPTCHA using distorted images.Steps
followed in its usage are as:
a) Create a large database of labeled
images
b) Pick a concrete object
c) Pick four images of the object from
the images database
d) Distort the images
e) Ask the user to pick the object for a
list of words To which side does the block
on the bottom belong?
16. Audio Based CAPTCHA
These are based on humans ability to depict sounds that
may be distorted, following algorithm is followed in
using it:
a) Pick a word or a sequence of numbers at random
b) Render them into an audio clip using a TTS software
c) Distort the audio clip
d) Ask the user to identify and type the word or numbers
17. Applications
Email services:
CAPTCHAs are used in attempts to prevent
automated software from performing actions
which degrade the quality of service of a given
system,whether due to abuse or resource
expenditure. CAPTCHAs can be deployed to
protect systems vulnerable to e-mail spam, such
as the webmail services
of Gmail, Hotmail, and Yahoo! Mail..
18. Applications
Continues…
Dictionary attacks:
CAPTCHAs can also be used to prevent dictionary
attacks in password systems. The idea is simple:
prevent a computer from being able to iterate
through the entire space of passwords by
requiring it to solve a CAPTCHA after a certain
number of unsuccessful logins.
19. Applications
Continues…
Protecting Website Registration:
Several companies (Yahoo!, Microsoft, etc.) offer
free email services. Up until a few years ago, most of
these services suffered from a specific type of attack:
"bots" that would sign up for thousands of email
accounts every minute. The solution to this problem
was to use CAPTCHAs to ensure that only humans
obtain free accounts. In general, free services should
be protected with a CAPTCHA in order to prevent
abuse by automated programs.
26. Breaking CAPTCHA
Most text based CAPTCHAs have been broken by
software
OCR(Optical Character Recognization)
Segmentation
Other CAPTCHAs were broken by streaming the tests
for unsuspecting users to solve.
27. Re-Captcha
Free captcha service that helps to digitize
books, newspaper and old time radio shows.
Recaptcha improves the process of digitizing
books by sending words that can’t be read by
computers to the web in form of captchas for
human to decipher.
28. Working of Re-Captcha
Continues...
Two words are shown, one word is known as
control word and another one is known as a
questionable word.
System assumes that if human types the
control word correctly, then the questionable
word is also correct.
31. Benefits
The database already exists and is public.
The database is constantly being updated and
maintained.
Adding “concrete objects” to the dictionary is
virtually instantaneous.
Distortion prevents caching hacks.
Quick expiration limits streaming hacks.
32. Drawbacks
Not accessible to people with disabilities (which
is the case of most CAPTCHAs).
Relies on Google’s infrastructure.
Unlike CAPTCHAs using random letters and
numbers, the number of challenge words is
limited.
33. Conclusion
Captchas are an effective way to and reduce
spam
They serves dual purpose- help advance AI
knowledge
Applications are varied from stopping bots to
character reorganization and pattern matching.