Final answer:
The null session enumeration technique exploiting a hidden share for inter-process communication is the exploitation of the IPC$ share on Windows systems. It is intended for processes to share information, but can be used by attackers to gather system information due to its lax security.
Step-by-step explanation:
The null session enumeration technique that exploits a hidden share designed for inter-process communication on Windows-based systems is the exploitation of the IPC$ share. This technique involves connecting to the Inter-Process Communication (IPC) share, which is intended to allow processes to communicate with each other and facilitate certain administrative functions. The IPC$ share does not enforce the same level of security checks that are applicable to file shares, making it a potential vector for gathering information about the system such as user names, share names, and other sensitive data without requiring authentication credentials.