This application discloses a physical unclonable function device including physical unclonable function units, each capable of generating an output. The physical unclonable function device can utilize transforms to derive bits from the outputs and utilize the derived bits to generate an identifier for the physical unclonable function device. An inspection configuration tool can sample multiple outputs from each of the physical unclonable function units, identify a transforms to perform on a future output for each of the physical unclonable function units based on a distribution of values corresponding to the sampled outputs. The inspection configuration tool can configure the physical unclonable function device to perform the transforms on the future outputs of the physical unclonable function units. Embodiments will be described below in greater detail.

This application discloses a physical unclonable function device including physical unclonable function units, each capable of generating an output. The physical unclonable function device can utilize transforms to derive bits from the outputs and utilize the derived bits to generate an identifier for the physical unclonable function device. An inspection configuration tool can sample multiple outputs from each of the physical unclonable function units, identify a transforms to perform on a future output for each of the physical unclonable function units based on a distribution of values corresponding to the sampled outputs. The inspection configuration tool can configure the physical unclonable function device to perform the transforms on the future outputs of the physical unclonable function units. Embodiments will be described below in greater detail.

To provide for a physical security mechanism that forms a complete envelope of protection around the cryptographic module to detect and respond to an unauthorized attempt at physical access, a tamper sensing encapsulant generally encapsulates the cryptographic module. The tamper sensing encapsulant includes a first shape actuation layer associated with an electrically conductive first trace element and a second shape actuation layer associated with an electrically conductive second trace element. The first shape actuation layer is positioned against the second shape actuation layer such that the first trace element and the second trace element do not physically touch at an operating temperature of the cryptographic module and do physically touch when the first shape actuation layer and the second shape actuation layer are thermally loaded. Upon first trace element and the second trace element touching, a circuit is formed that disables the cryptographic module.

To provide for a physical security mechanism that forms a complete envelope of protection around the cryptographic module to detect and respond to an unauthorized attempt at physical access, a tamper sensing encapsulant generally encapsulates the cryptographic module. The tamper sensing encapsulant includes a first shape actuation layer associated with an electrically conductive first trace element and a second shape actuation layer associated with an electrically conductive second trace element. The first shape actuation layer is positioned against the second shape actuation layer such that the first trace element and the second trace element do not physically touch at an operating temperature of the cryptographic module and do physically touch when the first shape actuation layer and the second shape actuation layer are thermally loaded. Upon first trace element and the second trace element touching, a circuit is formed that disables the cryptographic module.

A surgical instrument that comprises a receiving portion for removably receiving therein an interchangeable part, wherein the receiving portion has a communication connection, a handle having a controller electrically connected to the communication connection, and an interchangeable part removably connected to the receiving portion and having an encryption device electrically removably connected to the communication connection when at the receiving portion, wherein the encryption device is programmed to authenticate the interchangeable part upon an exchange with the controller when the interchangeable part is at the receiving portion and, after at least a partial use of the interchangeable part, store a used status of the interchangeable part.

A surgical instrument that comprises a receiving portion for removably receiving therein an interchangeable part, wherein the receiving portion has a communication connection, a handle having a controller electrically connected to the communication connection, and an interchangeable part removably connected to the receiving portion and having an encryption device electrically removably connected to the communication connection when at the receiving portion, wherein the encryption device is programmed to authenticate the interchangeable part upon an exchange with the controller when the interchangeable part is at the receiving portion and, after at least a partial use of the interchangeable part, store a used status of the interchangeable part.

A surgical instrument comprising a surgical end effector, operable to effect a surgical procedure when actuated, and an actuation assembly operable to actuate said surgical end effector. The actuation assembly comprises a part operable to move between a starting position and an actuated position in which the part actuates the surgical end effector, an electrically-powered motor, a transmission mechanically connecting the motor to the part and being operable to selectively displace the part to the starting position, the actuated position, and at least one point between the starting position and the actuated position when the motor is operated, and a manual release mechanically coupled to the transmission to selectively interrupt the transmission and, during interruption, displace the part towards the starting position independent of operation of the motor.

A hash value computation device (10) computes a hash value H of 2n bits using a block cipher E that takes as input a key K of k bits and a plaintext block P of n bits, which is a smaller number of bits than k bits, and outputs a ciphertext of n bits. A function computation unit (22) computes a function CF that processes the block cipher E a plurality of times sequentially on an input value M* of k-n bits, an input value S[1] of n bits, and an input value S[2] of n bits so as to compute an output value S[1] of n bits and an output value S[2] of n bits. A hash value computation unit (23) computes the hash value H from the output value S[1] and the output value S[2].

The present disclosure relates to a wireless dongle for the wireless transmission of data from a computer to at least one field device of a process automation system. The dongle includes a connection interface for connecting the dongle to a computer, a wireless interface for transmitting the data from the dongle to a field device, a memory, an arithmetic unit configured to generate and test signatures and release codes, as well as to perform encryption, and a housing, wherein the wireless interface, the memory, the arithmetic unit, and the connection interface are arranged in the housing, wherein only the part of the connection interface relevant for the connection to the computer is omitted from the housing. The present disclosure further relates to a method for wirelessly transmitting data from a computer to a field device.

The present disclosure relates to a wireless dongle for the wireless transmission of data from a computer to at least one field device of a process automation system. The dongle includes a connection interface for connecting the dongle to a computer, a wireless interface for transmitting the data from the dongle to a field device, a memory, an arithmetic unit configured to generate and test signatures and release codes, as well as to perform encryption, and a housing, wherein the wireless interface, the memory, the arithmetic unit, and the connection interface are arranged in the housing, wherein only the part of the connection interface relevant for the connection to the computer is omitted from the housing. The present disclosure further relates to a method for wirelessly transmitting data from a computer to a field device.