Counterfeiters use technology to copy products, so companies must also use technology to defend against being copied. Prevention of counterfeiting requires a technology that itself cannot be copied. The solution must identify the PCB board, peripheral connector, or subsystem to the OEM system and prove that it is a part of the authentic OEM system. The technology should use a cryptographically secure authentication algorithm such as SHA-256. This acronym stands for Secure Hash Algorithm with 256-bit secret keys.