Alternatively, imagine that a bank receives an e-mail
from a client, which instructs that all the client's funds
should be transferred to a private numbered bank
account in the Cayman Islands. Once again, without a
handwritten signature, how does the bank know that the
e-mail is really from the client? The e-mail could have
been written by a criminal attempting to divert the
money to his own Cayman Islands bank account. In order
to develop trust on the Internet, it is essential that there
is some form of reliable digital signature.
-The Code Book,
Simon Singh
What type of evidence appears in this paragraph?
What information is important to protect, according to
the example of the bank?