Galois Side-Channel Resilient Protocols are cryptographic protocols designed to protect against side-channel attacks that exploit unintentionally leaked signals from physical implementations of cryptographic systems. Side-channel attacks measure patterns in power consumption, electromagnetic radiation, or sound emissions to extract sensitive information such as secret keys, bypassing traditional security defenses. These protocols incorporate techniques to prevent information leakage through auxiliary channels regardless of the implementation environment. The protocols utilize methods including masking, blinding, randomizing execution times, and power analysis resistant design to shield cryptographic functions from side-channel exploitation. The protocols address a security vulnerability where attackers can break into systems by analyzing physical characteristics of the implementation rather than attacking the cryptographic algorithm directly. This approach provides defense against both direct attacks on cryptographic algorithms and indirect attacks through physical implementation characteristics. The protocols are developed by Galois, a company specializing in advanced cryptography and privacy research. The technology is positioned as a solution for organizations requiring protection of sensitive data in cryptographic systems against sophisticated attack vectors that target physical implementation weaknesses.