Abstract: Unlocking an electronic device includes displaying, by a security module, a plurality of objects including at least one target object and at least one decoy object, where the at least one target object is obtained from a stored history of viewed objects, detecting, by the security module, a user selection from the plurality of objects, and in response to detecting that the user selection is one of the at least one target objects, unlocking, by the security module, the electronic device.

Abstract: A method includes storing a first password and a second password in memory of the electronic device, wherein the first password and the second password are used to allow a user to gain access to a resource of the electronic device, and wherein the second password has greater password strength than the first password. The method further includes, during a first time period passing since the user last accessed the resource, granting the user access to the resource in response to receiving the first password, and, during a second time period following the first time period, granting the user access to the resource only in response to receiving the second password. An alternative method increases the number of required security measures as a function of time since the user last accessed the resource.

Abstract: A computer program product for controlling access to a resource of an electronic device includes program instructions for executing a method. The method stores a first password and a second password in memory of the electronic device, wherein the first password and the second password are used to allow a user to gain access to a resource of the electronic device, and wherein the second password has greater password strength than the first password. The method further includes, during a first time period passing since the user last accessed the resource, granting the user access to the resource in response to receiving the first password, and, during a second time period following the first time period, granting the user access to the resource only in response to receiving the second password. An alternative method increases the number of required security measures as a function of time since the last access.