>> 2014-05-18 13:14 GMT+01:00 Andreas Schildbach <andr...@schildbach.de>: >> One problem we couldn't figure out here though - how to protect the >> notes from unauthorized redeem. Like if someone else tries to reach your >> wallet with his own NFC - how can we distinguish between deliberate >> redeem by owner and fraudulent redeem by anybody else with custom built >> long range NFC antenna? Any ideas? >> >> I think you'd need multiple factors to protect against that attack. Like >> encrypting with a key that is printed on the note as an QR code. > >On Sun, May 18, 2014 at 7:51 AM, Alex Kotenko <alexy...@gmail.com> wrote: > > Yes, but it must not sacrifice usability. It's paper money, people are used > to it and they have rather high standard of expectations in this area. Any > usbility sacrifices in this area result into failure of the whole thing. > > Best regards, > Alex Kotenko
One thought I had reading through this exchange: I think the general public is becoming more aware of the "hacker with a long range antenna" sort of attack, since credit cards are getting microchips that can be scanned. There's a few videos I've seen of white hat hackers demonstrating how a suitcase-sized apparatus carried by someone walking down the street can scan and make charges on cards in people's pockets as the attacker brushes past. Hence RFID-blocking sleeves/wallets are on the market, such that your smart credit card can't make a purchase while its in your wallet. Is a RFID-blocking wallet also NFC-blocking? Irregardless of whatever "future cash" you choose to carry (be it credit card or bitcoin card/coin/cash), perhaps its the wallet/purse that needs an upgrade, to ensure your money doesn't spend itself while its in your pocket, but you can easily remove it and spend it conveniently? Brooks ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
