parent / child processes

Process A creates another process B. Process A then dies, but process B still has the PID of process A marked as its parent process. Later on, a process C starts and is randomly assigned the PID that process A was originally assigned.

Are there any security or other implications of this happening?

>>1
you got it wrong. in *nix at least, a child process does not inherit that parent's process number; it has its own and the parent process continues to exist as a "zombie" process until the child process is done as well, after which the OS cleans it up. it's impossible for something to "inherit" the parent process' pid.