Key Management Service (KMS) is a cloud service that helps you manage cryptographic keys for your cloud services. It's used to create, control, and rotate the encryption keys used to secure data.
KMS works by providing a centralized control point to manage cryptographic keys. When a user or service needs to encrypt or decrypt data, they make a request to KMS, which performs the operation and logs the access.
A company might use KMS to manage the encryption keys for their customer database. When a customer's data is saved, the application makes a request to KMS to encrypt the data.
A pair of cryptographic keys used for encryption and decryption or to create digital signatures.