Cryptography Reference
In-Depth Information
Many banks allow customers to deposit checks simply by taking a pic-
ture of it with a smartphone app.
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Internet. The merchant must still verify the customer's
identity, even though they may be separated by thousands
of miles, and the customer must still be assured that he
will only be charged the agreed amount. However, there
is a whole gamut of new concerns. The customer must be
assured that information he communicates to the mer-
chant is confidential and protected from interception by
others. And while the merchant retains the customer's
signature as material proof of a direct transaction, he has
only a string of 0s and 1s on a hard disk following an e-com-
merce transaction. The merchant must be confident that
this “information” will suffice for him to collect payment,
as well as protect him should the customer later disavow
