How does security in a distributed file system using mutual authentication differ from file security...

 Security in a distributed file system using mutual authentication differs from file security in a multi-user host in that access control cannot rely on the Operating System (OS), and eavesdropping is possible. A distributed file system is a system that allows users to access files stored on remote servers over a network. Mutual authentication is a process where both the client and the server verify each other’s identity before establishing a connection. In a distributed file system, access control cannot rely on the OS, because the OS may not have the same security policies or mechanisms as the remote server. Therefore, access control must be implemented at the application layer, using protocols such as Kerberos or SSL/TLS. Eavesdropping is also possible in a distributed file system, because the network traffic may be intercepted or modified by malicious parties. Therefore, encryption and integrity checks must be used to protect the data in transit. A multi-user host is a system that allows multiple users to access files stored on a local server. In a multi-user host, access control can rely on the OS, because the OS can enforce security policies and mechanisms such as permissions, groups, and roles. Eavesdropping is less likely in a multi-user host, because the network traffic is confined to the local server. References: Official (ISC)2 CISSP CBK Reference, Fifth Edition, Domain 3: Security Architecture and Engineering, p. 373-374; CISSP All-in-One Exam Guide, Eighth Edition, Chapter 3: Security Architecture and Engineering, p. 149-150.