The technology is directed to a system for separately encrypting parameters of an access token. The system may receive a request for an access token and may determine computing devices for receiving the access token and sets of parameters that each computing device is to access. The system may identify encryption keys associated with the computing devices. Each computing device may store a corresponding decryption key for decryption a corresponding set of parameters. The system may encrypt each set of parameters using a corresponding encryption key to generate encrypted sets of parameters. The system may generate the access token by adding the encrypted sets of parameters to the access token. The system may then transmit the access token to a requesting device.