Abstract: Aspects include a cryptographic hardware security module having a secure embedded heat pipe and methods for assembling the same. The cryptographic hardware security module can include a printed circuit board having one or more components. The cryptographic hardware security module can further include an encapsulation structure having a top can and a bottom can. The top can is fixed to a first surface of the printed circuit board and the bottom can is fixed to second surface of the printed circuit board opposite the first surface. A heat pipe is positioned between the top can and the component. The heat pipe includes two or more 180-degree bends. A portion of the heat pipe extends beyond a secure region of the encapsulation structure.

Abstract: A structure of a circuitry substrate for securing an area from tampering is disclosed. The structure includes a circuitry substrate with at least one of a top tamper enclosure and a bottom tamper enclosure covering a component in a protected area of the circuitry substrate. The top and bottom tamper enclosures are adhesively bonded to a surface of the circuitry substrate, and a tear initiation site is added to a side of the perimeter of circuitry substrate bordering the protected area that includes at least one tamper enclosure, such that the tear initiation site is located and configured to enable propagation of a delamination of at least one internal layer of the circuitry substrate and a severing of a security circuit when a removal force is applied to the at least one of the top tamper enclosure and the bottom tamper enclosure.

Abstract: A substantially reflection-less terminator 200,400 for an optical waveguide 102, 106 is disclosed. The termination is especially useful in preventing undesired reflections at the ends of unused fibers in an optical coupling device 100. In an illustrative embodiment, the terminator comprises a length of optical fiber 206. The front end of the fiber 206 is attached to a ferrule 222 for mating with a connector plug 10' attached to the end of the fiber to be terminated. The rear end of the fiber 206 is crushed at an angle and inserted into an index matching opaque adhesive material 230.