3. The method as recited in claim 2 , wherein converting the user-entered text string into a binary signature comprises the following: converting the user-entered text string into a binary signature using a second set of specified rules, which causes the user-entered text string to differ from an original version prior to conversion into the binary signatures.
3. The method as recited in claim 2 , wherein converting the user-entered text string into a binary signature comprises the following: converting the user-entered text string into a binary signature using a second set of specified rules, which causes the user-entered text string to differ from an original version prior to conversion into the binary signatures. 4. The method as recited in claim 3 , wherein the first set of specified rules and the second set of specified rules are the same.