A semiconductor integrated circuit having a resistor is disclosed in which the resistor is formed by a series connection of one element having a positive temperature coefficient and another element having a negative temperature coefficient. The challenge has no access to the private keying material. The die is configured to emit wavelengths of light within a first predetermined spectral range. At each request for establishing a connection i from an origin node to a destination node, the dependent connection management process:. The reference solutions of the disclosure utilize a synthetic cruor in combination with an Hb peptide chain.