Adding IPC to Linux

Recently I have been learning about different IPC mechanisms that are available in Linux. I find that there are primitive IPC mechanisms, SELinux additions, and new mechanisms like D-Bus.

My question is related to system engineers that work on Linux.

• Given the design of different IPC mechanisms, what attributes / criteria are used to decide what kind of security they require when they integrated with Linux ? (Answer could use example of say system V vs D-Bus)


• Does the Linux runtime environment, specifically, privileges carried by & isolation present between programs / processes play a major role ?

Edit

Given the question was too broad, based on feedback, I narrowed it down to something more concrete:

• Given the design of sys V IPC e.g. message queues, what attributes / criteria are used to decide that ACL would be required to secure it when integrated with Linux ?


• Did the Linux runtime environment, specifically, privileges carried by & isolation present between programs / processes play a major role ?