Abstract: Various embodiments of the present invention relates to systems, devices and methods of detecting tampering and preventing unauthorized access by incorporating programmability and randomness into a process of coupling, driving and sensing conductive wires that are arranged above sensitive areas in a secured system. Such a tampering detection system comprises a security mesh network, a random number generator, a security controller and a security monitor. The security mesh network includes a plurality of security elements made from the conductive wires. The security controller selects a subset of security elements, forms a security array, and generates a driving stimulus. The security monitor selects a SENSE node, monitors an output at the SENSE node, and generates a flag signal indicating the presence of a tampering attempt. Programmability and randomness are introduced to at least one of the system parameters including array configuration, driving stimulus, SENSE node, and detection mode via random numbers.

Abstract: Various embodiments of the present invention relates to systems, devices and methods of detecting tampering and preventing unauthorized access by incorporating programmability and randomness into a process of coupling, driving and sensing conductive wires that are arranged above sensitive areas in a secured system. Such a tampering detection system comprises a security mesh network, a random number generator, a security controller and a security monitor. The security mesh network includes a plurality of security elements made from the conductive wires. The security controller selects a subset of security elements, forms a security array, and generates a driving stimulus. The security monitor selects a SENSE node, monitors an output at the SENSE node, and generates a flag signal indicating the presence of a tampering attempt. Programmability and randomness are introduced to at least one of the system parameters including array configuration, driving stimulus, SENSE node, and detection mode via random numbers.

Abstract: Methods and apparatus to lock a phase lock loop to a spindle motor are disclosed. An example controller comprises a counter to determine a period of an operating signal received from a motor, an oscillator to generate a control signal based on an input signal, and an initializer to generate the input value based on the period, wherein the input value causes the oscillator to generate the control signal having the same phase as the operating signal.