3. The method of claim 2 , wherein the discarding comprises: if said manual user correction operation that the user performs, matches the first possible manual user response that is performed by at least 90 percent of the general population of users, then discarding said temporary input/output interference from being re-used in subsequent usage sessions of said user.
2. The method of claim 1 , comprising: determining whether a user, who utilizes a computing device to interact with a computerized service, is either an authorized user or an attacker; wherein the determining comprises: generating a temporary input/output interference that causes an anomaly between (A) input gestures that the user performs via an input unit of said computing device, and (B) output that is displayed on a display unit of said computing device as a result of the input gestures; wherein the temporary input/output interference is a binary-type interference defined to trigger one of two possible manual user responses, wherein the two possible manual user responses comprise: a first possible manual user response that is performed by a majority of a general population of users; and a second possible manual user response that is performed by a minority of the general population of users; tracking user interactions via said input unit in response to said temporary input/output interference; detecting a manual correction operation that the user performs via said input unit in response to said temporary input/output interference; determining whether said manual correction operation that the user performs via said input unit, matches either the first possible manual user response or the second possible manual user response; if said manual user correction operation that the user performs, matches the first possible manual user response that is performed by majority of the general population of users, then discarding said temporary input/output interference from being re-used in subsequent usage sessions of said user; if said manual user correction operation that the user performs, matches the second possible manual user response that is performed by minority of the general population of users, then updating a user profile to indicate that said temporary input/output interference is to be re-used in subsequent usage sessions of said user.