3015 search results - page 1 / 603 » The robustness of a new CAPTCHA |
EUROSEC
2010
ACM
13 years 10 months ago
2010
ACM
CAPTCHA is a standard security technology that presents tests to tell computers and humans apart. In this paper, we examine the security of a new CAPTCHA that was deployed until v...
ISW
2004
Springer
13 years 10 months ago
2004
Springer
CAPTCHAs are tests that distinguish humans from software robots in an online environment [3, 14, 7]. We propose and implement three CAPTCHAs based on naming images, distinguishing ...
ICMCS
2006
IEEE
13 years 11 months ago
2006
IEEE
In this paper, a CAPTCHA is presented based on the masking characteristics of the Human Visual System (HVS). Knowing that noise can be masked by high activity regions and showing ...
NIPS
2008
13 years 6 months ago
2008
CAPTCHAs are computer-generated tests that humans can pass but current computer systems cannot. CAPTCHAs provide a method for automatically distinguishing a human from a computer ...
CHI
2009
ACM
14 years 5 months ago
2009
ACM
Audio CAPTCHAs were introduced as an accessible alternative for those unable to use the more common visual CAPTCHAs, but anecdotal accounts have suggested that they may be more di...