Acoustic Debit Card for Africa · Global Voices
Jennifer Brea

Olivier Gabirault writes [Fr] about Maâtcard, an acoustic, prepayed debit card for developing countries which will debut in Cameroon next April.  The Maâtcard functions like a normal credit card, but also emits a unique, unfalsifiable sound, enabling users to securely make payments, buy air time, or transfer funds by telephone.