New Scientist: Software that generates a unique email address for every message sent could help cut down spam, a US computer scientist believes.



This is because hidden in the address are encrypted rules determining who is permitted to reply to the address, as well as how many replies can be sent and when.



For example, a user could safely sign up for a monthly email newsletter by specifying the source of the newsletter and limiting it to 12 messages over the next year. If the address fell into the hands of spammers, their messages would be blocked by the software before it reached the user’s inbox.

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