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Cryptographic keys are a requirement for any security system. They manage everything, including data encryption and decryption as well as user authentication. Private keys are what store information about your cryptocurrency holdings and spending limits. You won't be able to get your currencies back if you misplace your private keys or they are stolen. Using a key management system (KMS) is a tool that is used to create, store, and use [cryptographic keys] in a secure manner. It is easy to use while providing a high level of security.