Abstract: A user device comprising a processor configured to enable a mnemonic based digital signature scheme for user authentication that is based on a combination of one or more secrets and one or more actions implemented on the user device and associated with the secrets, and a device input system coupled to the processor and configured to detect the actions implemented on the user device. Also disclosed is an apparatus comprising a processor configured to implement a mnemonic based digital signature for authenticating a user, a device input system configured to enable the mnemonic based digital signature, and a memory unit configured to store input data that is used to recognize the mnemonic based digital signature, wherein the mnemonic based digital signature comprises a secret, an action associated with the secret and implemented using the device input system, and a cue associated with the action.

Abstract: A method and a system for shape based encrypted object usage control using a querying device includes receiving location coordinates information and requesting an access to the encrypted object based on the received location coordinates information. The granting or denying access to the object is based on a determination of whether the received location coordinates information lies within at least one spatial access boundary. The at least one spatial access boundary is defined by an arbitrary physical object shape with at least two dimensional (2D) physical measurements in direct reference to designated location coordinates information. The received location coordinates information and the designated location coordinates information each includes longitude, latitude and optionally elevation values which provide the ability to identifying a specific location in a 3D space.

Abstract: A user device comprising a processor configured to enable a mnemonic based digital signature scheme for user authentication that is based on a combination of one or more secrets and one or more actions implemented on the user device and associated with the secrets, and a device input system coupled to the processor and configured to detect the actions implemented on the user device. Also disclosed is an apparatus comprising a processor configured to implement a mnemonic based digital signature for authenticating a user, a device input system configured to enable the mnemonic based digital signature, and a memory unit configured to store input data that is used to recognize the mnemonic based digital signature, wherein the mnemonic based digital signature comprises a secret, an action associated with the secret and implemented using the device input system, and a cue associated with the action.