Cloud keys are credentials that allow programs or users to authenticate to cloud platforms and APIs. They can include access key pairs, API tokens, service account secrets, and temporary session credentials. Because they often grant direct access to storage, compute, logs, or management interfaces, a leaked cloud key can be more damaging than a simple password.
In cyber security, cloud keys matter because attackers frequently search public websites, code repositories, backups, and misconfigured servers for exposed secrets. If a key is found in a web root or configuration file, it can be used to list buckets, download data, create resources, or pivot into other cloud services. Defenders reduce this risk by using short-lived credentials, least-privilege roles, secret managers, key rotation, and automated scanning to detect exposed keys before they are abused.