5 search results - page 1 / 1 » On Memory-Bound Functions for Fighting Spam |
CRYPTO
2003
Springer
13 years 9 months ago
2003
Springer
In 1992, Dwork and Naor proposed that e-mail messages be accompanied by easy-to-check proofs of computational effort in order to discourage junk e-mail, now known as spam. They pro...
FSTTCS
2003
Springer
13 years 9 months ago
2003
Springer
A key idea in cryptography is using hard functions in order to obtain secure schemes. The theory of hard functions (e.g. one-way functions) has been a great success story, and the ...
WWW
2009
ACM
14 years 5 months ago
2009
ACM
Image spam is a new obfuscating method which spammers invented to more effectively bypass conventional text based spam filters. In this paper, we extract local invariant features ...
ISCAPDCS
2004
13 years 5 months ago
2004
A promising anti-spam technique consists in collecting users opinions that given email messages are spam and using this collective judgment to block message propagation to other u...
CNIS
2006
13 years 5 months ago
2006
Almost all current anti spam measures are reactive, filtering being the most common. But to react means always to be one step behind. Reaction requires to predict the next action ...