A fundamental cryptographic task is secure communication, in which two or more parties exchange confidential messages in the presence of an eavesdropper. In some scenarios, however, the identity of the communicating parties may also be sensitive information. In these situations, it is essential to ensure that the identities remain concealed throughout the protocol. In this talk, I will explore how quantum systems bring advantages to anonymous communication. I will then focus on the task of anonymously establishing a secret key among several users in a quantum network, introducing a security framework that encompasses both secrecy of the key and user anonymity. I will present efficient and noise-tolerant protocols that leverage the correlations of multipartite Greenberger–Horne–Zeilinger (GHZ) states, demonstrating their superiority over protocols based on bipartite entanglement. Finally, I will discuss a recent experiment showcasing that the advantages of multipartite entanglement can already be witnessed with current technology.