The Journal of the Society for Art and Science
Cover sheet for paper submissions

* Paper Types (choose one)
  - Original Full Paper 

* Paper Fieldichoose onej
  2) Science/Technology

* Categories (choose one or more)
  a-6) Image Processing
  b-1) Human Interfaces

* Title
Generation of CAPTCHA using Sprinkled Destructors

* Author(s)
Youngha Chang(Regular Member),
Akinori Urayama(Non-Member),
Miho Watanabe(Non-Member),
Nobuhiko Mukai(Regular Member)

* Author Affiliation(s)
Tokyo City University

* Author E-mail Address(es)
chang@vgl.cs.tcu.ac.jp

* Name, Address, Affiliation, Telephone number, Fax number, and E-mail
  Address of the Contact Person
Youngha Chang
Tamazutsumi1-28-1, Setagaya-ku, Tokyo, Japan
03-5707-0104
chang@vgl.cs.tcu.ac.jp

* Abstract (approx. 100 words)
CAPTCHA is a security system that is intended to distinguish 
computers and humans. 
In this paper, we propose a new text-based CAPTCHA system. 
Humans can recognize partially-hidden objects that computers
cannot. We use this feature to propose a new text-based CAPTCHA, where
sprinkled destructors are placed on and behind the characters. 
As the result of the evaluation of our method, 
we have found that a general character recognition software, 
Google Tesseract, and CAPTCHA solver system were not able to recognize 
the CAPTCHA generated by our method, while humans were able
to do them 94.2%.

* Keywords (around five)
CAPTCHA, text-based CAPTCHA, security, perception