hashcash spam prevention & GSM/SMS

Mike Michael.Johnson at mejl.com
Mon Dec 15 03:25:46 PST 1997



Adam Back wrote:
>I am looking at writing some hashcash
>(http://www.dcs.ex.ac.uk/~aba/hashcash/) based spam prevention
>software.  The motivation for writing spam prevention software is that
>spam is better combatted with technical methods than legal or
>political

Would this work for GSM phones as well? I believe that GSM-spam is becoming
a wide spread problem. In Finland the GSM phone numbers are published in
online databases where spammers get the numbers and they use free
Internet-to-GSM/SMS message services.

Using hashcash on the smartcard in a GSM phone would be really neat!


Mike.







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