Abstract
In Peha’s Financial Cryptography 2004 invited talk, he described the Cyphermint PayCash system (see www.cyphermint.com), which allows people without bank accounts or credit cards (a sizeable segment of the U.S. population) to automatically and instantly cash checks, pay bills, or make Internet transactions through publicly-accessible kiosks. Since PayCash offers automated financial transactions and since the system uses (unprotected) kiosks, security is critical. The kiosk must decide whether a person cashing a check is really the person to whom the check was made out, so it takes a digital picture of the person cashing the check and transmits this picture electronically to a central office, where a human worker compares the kiosk’s picture to one that was taken when the person registered with Cyphermint. If both pictures are of the same person, then the human worker authorizes the transaction.
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Gentry, C., Ramzan, Z., Stubblebine, S. (2009). Secure Distributed Human Computation. In: Christianson, B., Crispo, B., Malcolm, J.A., Roe, M. (eds) Security Protocols. Security Protocols 2006. Lecture Notes in Computer Science, vol 5087. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04904-0_24
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