Which feature can help prevent unauthorized access to API calls in Genesys Cloud?

OAuth token authentication is a crucial feature that helps prevent unauthorized access to API calls in Genesys Cloud. This security mechanism allows only authenticated users or systems to access API endpoints by requiring a valid OAuth token for each request. When a client application wants to access protected resources, it must first authenticate with an authorization server, which issues an access token after verifying the credentials. This token is then used in subsequent API requests to confirm that the requester is permitted to make those calls, ensuring that only legitimate users can interact with the APIs.

Utilizing OAuth token authentication enhances security by implementing a standardized method for managing access, where tokens can be easily revoked or expired, mitigating risks associated with unauthorized access. Additionally, it provides a way to enforce scope limitations, allowing finer control over what specific data and actions an authenticated user can access.

The other choices, while important for various aspects of security, do not directly prevent unauthorized access like OAuth does. For example, rate limiting controls the number of API requests in a specified timeframe to prevent abuse but does not authenticate the user. Comprehensive logging tracks API usage and can help identify misuse post-factum but does not stop unauthorized access at the entry point. Encryption of data secures the information in transit and at rest but does not control