[$] A security model for systemd

Linux has many security features and tools that have evolved over
the years to address threats as they emerge and security gaps as they
are discovered. Linux security is all, as Lennart Poettering observed at the All Systems Go! conference held
in Berlin, somewhat random and not a 'clean'
design. To many observers, that may also appear to be the case for
systemd; however, Poettering said that he does have a vision for how
all of the security-related pieces of systemd are meant to fit
together. He wanted to use his talk to explain 'how the individual
security-related parts of systemd actually fit together and why they
exist in the first place'.