A Korean CAPTCHA Study: Defeating OCRs In a New CAPTCHA Context By Using Korean Syllables

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

SEIMCHA: a new semantic image CAPTCHA using geometric transformations

As protection of web applications are getting more and more important every day, CAPTCHAs are facing booming attention both by users and designers. Nowadays, it is well accepted that using visual concepts enhance security and usability of CAPTCHAs. There exist few major different ideas for designing image CAPTCHAs. Some methods apply a set of modifications such as rotations to the original imag...

متن کامل

Cursor CAPTCHA – Captcha Mechanism using Mouse Cursor

With the growing and prevalent usage of Internet, threat for the service providers has arisen. One of the most important aspects of modern security concerns is to deal with users that are computer programs or bots. These programs pretend to be human users and exploit servers by submitting data automatically, thereby, hindering the services of the server. Security mechanism dealing with such att...

متن کامل

Cryptography Using Captcha Puzzles

A Captcha is a puzzle that is easy for humans but hard to solve for computers. A formal framework, modelling Captcha puzzles (as hard AI problems), was introduced by Ahn, Blum, Hopper, and Langford ([ABHL03], Eurocrypt 2003). Despite their attractive features and wide adoption in practice, the use of Captcha puzzles for general cryptographic applications has been limited. In this work, we explo...

متن کامل

Pitfalls in CAPTCHA design and implementation: The Math CAPTCHA, a case study

We present a black-box attack against an already deployed CAPTCHA that aims to protect a free service delivered using the Internet. This CAPTCHA, referred to as ‘‘Math CAPTCHA’’ or ‘‘QRBGS CAPTCHA’’, requests the user to solve a mathematical problem in order to prove human. We study significant problems both in its design and its implementation, and how those flaws can be used to completely sol...

متن کامل

A Hidden Contributor to the Korean Miracle: The Korean Credit :union: Movement

Korean credit :::union:::s (CUs) are considered to be a hidden contributor to the “Korean miracle”, characterized by remarkable economic growth and relatively low income inequality. The Korean miracle not only generated wealth in an economically strapped and socially under-privileged people, but also contributed to regional community development and the democratization of Korean society. In...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: International Journal of Contents

سال: 2009

ISSN: 1738-6764

DOI: 10.5392/ijoc.2009.5.3.050