$10\mathrm{.}1$ Peer$-$to$-$peer systems typically depend on untrusted and volatile computer systems for most of their resources. Trust is a social phenomenon with technical consequences. Volatility $($i$.$e$.$ unpredicatable availability$)$ also is often due to human actions. Elaborate your answers to Exercise

$10\mathrm{.}4$ by discussing the possible ways in which each of them is likely to differ according to the following attributes of the computers used:

i$)$ ownership

ii$)$ geographic location

iii$)$ network connectivity

iv$)$country or legal jurisdiction

What does this suggest about policies for the placement of data objects in a peer$-$to$-$peer storage service?

iv$)$ hardware or software errors.

Give two examples of possible incidents for each type of violation. Which of them could be described as a breach of trust or a criminal act? Would they be breaches of trust if they occurred on a personal computer that was contributing some resources to a peer$-$to$-$peer service? Why is this relevant for peer$-$to$-$peer systems?