Environment-tolerant tamper-proof circuit board

A system for tamper-proofing electronics via a tamper detection circuit that includes a wheatstone bridge circuit, wherein the tamper detection circuit includes a board portion of the tamper detection circuit and a housing portion of the tamper detection circuit, the system comprising:

• a circuit board, the circuit board comprising:
• a non-conductive board configured to be at least partially enclosed by a security housing, the security housing comprising the housing portion of the tamper detection circuit, wherein the housing portion of the tamper detection circuit includes a plurality of conductive tamper traces that are configured to act as a plurality of resistors along legs of the wheatstone bridge circuit,
• the board portion of the tamper detection circuit comprising a board portion of the wheatstone bridge circuit,
• a plurality of board connection nodes of the board portion of the tamper detection circuit, the plurality of board connection nodes configured to electrically connect the board portion of the tamper detection circuit to the housing portion of the tamper detection circuit via a plurality of connector pieces to complete the tamper detection circuit and thereby complete the wheatstone bridge circuit, and
• a plurality of voltage monitor nodes of the board portion of the tamper detection circuit, wherein the board portion of the tamper detection circuit detects tampering based on a plurality of voltages measured at the plurality of voltage monitor nodes, wherein the plurality of voltage monitor nodes are configured to act as a plurality of wheatstone bridge voltage monitor nodes along the legs of the wheatstone bridge circuit.

A system for tamper-proofing electronics via a tamper detection circuit that includes a wheatstone bridge circuit, wherein the tamper detection circuit includes a board portion of the tamper detection circuit and a housing portion of the tamper detection circuit, the system comprising:

• a security housing comprising:
• a non-conductive housing comprising an interior surface and an exterior surface, the non-conductive housing configured to enclose at least a portion of a circuit board, the circuit board comprising the board portion of the tamper detection circuit, the board portion of the tamper detection circuit comprising a plurality of voltage monitor nodes that are configured to act as a plurality of wheatstone bridge voltage monitor nodes along legs of the wheatstone bridge circuit, and
• a housing portion of the tamper detection circuit, wherein the housing portion of the tamper detection circuit includes a plurality of conductive tamper traces that are configured to act as a plurality of resistors along the legs of the wheatstone bridge circuit, wherein the housing portion of the tamper detection circuit is configured to electrically connect to the board portion of the tamper detection circuit via a plurality of connector pieces to complete the tamper detection circuit and thereby complete the wheatstone bridge circuit, wherein the board portion of the tamper detection circuit is configured to detect tampering along the tamper detection circuit based on a plurality of voltages measured at the plurality of voltage monitor nodes of the board portion of the tamper detection circuit.