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» Moderately Hard Functions: From Complexity to Spam Fighting
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FSTTCS
2003
Springer
14 years 25 days ago
Moderately Hard Functions: From Complexity to Spam Fighting
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 ...
Moni Naor
CNIS
2006
13 years 9 months ago
Dynamically blocking access to web pages for spammers' harvesters
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 ...
Tobias Eggendorfer, Jörg Keller