Key Shadowing technology offers a radical breakthrough in data security by eliminating the need to store a cryptographic master key, which is vulnerable to today’s computers and social engineering. With Key Shadowing, master keys are never persistently stored and therefore cannot be hacked or stolen resulting in a “keyless” system. The technology not only protects against attacks based on quantum computing, it also provides unique benefits by securing payment systems, enhancing enterprise key management, bolstering multi-factor authentication, and securing blockchains and private key infrastructure.