As companies create increasingly far-flung teams and commerce becomes more global, demand for secure ways to exchange information will only rise.

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BlackBerry Bold 9930 also offers Near Field Communications (NFC) support for a secure exchange of information between NFC-enabled devices over a very short distance.

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Dr Naor thinks that computerised versions of his method could have widespread applications in areas such as banking, where the secure exchange of information requires the comparison of passwords.

ECONOMIST: Cryptography