233 search results - page 32 / 47 » CAPTCHA: Using Hard AI Problems for Security |
CORR
2008
Springer
14 years 9 months ago
2008
Springer
The concept of universal designated verifier signatures was introduced by Steinfeld, Bull, Wang and Pieprzyk at Asiacrypt 2003. These signatures can be used as standard publicly ve...
ICAIL
2003
ACM
15 years 2 months ago
2003
ACM
Problems with legal quality will not only increase effort and costs of the law enforcement organisations, but also undermines the regulating power of the legislator. Unintended us...
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CRYPTO
1998
Springer
15 years 1 months ago
1998
Springer
The exponentiation function in a finite field of order p (a prime number) is believed to be a one-way function. It is well known that O(log log p) bits are simultaneously hard for ...
AAECC
2006
Springer
14 years 9 months ago
2006
Springer
Abstract. After some excitement generated by recently suggested public key exchange protocols due to Anshel-Anshel-Goldfeld and Ko-Lee et al., it is a prevalent opinion now that th...
ECRIME
2007
15 years 1 months ago
2007
We propose a scheme that exploits scale to prevent phishing. We show that while stopping phishers from obtaining passwords is very hard, detecting the fact that a password has bee...