The Penny Black Project is a Microsoft Research project that tries to find effective and practical ways of fighting spam. Because identifying spams consumes a recipient's time, the idea is to make the sender of emails "pay" a certain amount for sending them. The currency or the mode of payment could be CPU cycles, Turing tests or memory cycles. Such a payment would limit spammers' ability to send out large quantities of emails quickly.
The project's name is derived from the Penny Black, the world's first adhesive stamp used for pre-paid postage.
Famous quotes containing the words penny and/or black:
“Socialized medicine, some still cry, but it’s long been socialized, with those covered paying for those who are underinsured. American medicine is simply socialized badly, penny wise and pound foolish.”
—Anna Quindlen (b. 1952)
“If there is a man white as marble
Sits in a wood, in the greenest part,
Brooding sounds of the images of death,
So there is a man in black space
Sits in nothing that we know,
Brooding sounds of river noises....”
—Wallace Stevens (1879–1955)