Security - Technology
Encryption key
A secret value used to scramble data or turn it back into readable form
What's it for?
Provides the secret needed to lock or unlock protected information.
For example…
A payment system keeps encryption keys in a managed vault; applications request use of the key without ever seeing it in code.
An encryption key is stored in a managed key vault and only the payment service is allowed to use it to decrypt sensitive records.
Think of it like…
The physical key to a safe — the steel door is useless if the key hangs on a public hook