Description: Joint data privacy is a fundamental concept in the realm of federated learning, referring to the practice of ensuring data privacy while collaborating on training artificial intelligence models. Instead of centralizing data on a single server, federated learning allows models to be trained locally on distributed devices or servers, using data that never leaves its original location. This means that while models are updated and improved through collaboration, sensitive user data remains protected and is not shared directly. This methodology is particularly relevant in contexts where privacy protection is crucial, such as in healthcare, finance, and personal services. The main features of joint data privacy include the use of encryption techniques, model aggregation, and data minimization, allowing organizations to benefit from collective intelligence without compromising individual information security. In summary, joint data privacy is an innovative approach that enables the advancement of artificial intelligence and machine learning while respecting and protecting user privacy.