Key Ring (software)

A key ring (sometimes also referred to as a key storage) in software is a secure storage system designed to hold cryptographic keys, passwords, and other sensitive credentials. The primary function of a key ring is to protect this sensitive data from unauthorized access and to provide a mechanism for applications to securely retrieve and use these credentials.

Key rings typically employ encryption to protect the stored data, requiring a master password or passphrase to unlock the ring and access the stored secrets. Different key ring implementations offer varying levels of security, access control, and management features.

Key rings are often used by applications that require secure authentication, such as email clients, web browsers, and database management tools. They can also be used to store SSH keys, GPG keys, and other cryptographic materials. By centralizing the storage of sensitive information in a key ring, users can avoid the need to repeatedly enter passwords and can reduce the risk of exposing their credentials through insecure storage methods like plain text configuration files.

The specific features and implementation of a key ring can vary depending on the operating system and the software that utilizes it. Some operating systems provide built-in key ring services, while others rely on third-party applications to provide this functionality. Common examples of key ring software include GNOME Keyring, KDE Wallet (KWallet), and Apple's Keychain Access.