A Java program is being developed to read a file from computer A and write it to computer B, using a third computer C. The program is not working as expected. What is the MOST probable security featur

Java's security manager and sandbox model implement least privilege by denying access to sensitive resources such as file systems and network connections unless explicitly granted via a security policy. A program on computer C attempting to read from computer A and write to computer B would be blocked by default because it has not been granted the specific permissions required for cross-host file and network operations. This is a core Java security principle that limits what code can do to only what is minimally necessary.

Privilege escalation is a security threat or attack vector where an attacker gains elevated permissions, not a Java security feature that would restrict program functionality.

Defense in depth is a layered security strategy concept applied broadly across systems and architectures, not a specific Java security mechanism that would block file or network access between computers.

Privilege bracketing is a technique of acquiring privileges only when needed and releasing them immediately after, which is a programming best practice but is not a built-in Java security feature that would cause the described program failure.