> What ensures the integrity of conveyed information for physical mail? For flyers? For telephone conversations? Nothing, really. But for physical mail the att

> What ensures the integrity of conveyed information for physical mail? For flyers? For telephone conversations? Nothing, really. But for physical mail the attacks against it don't scale nearly as well: you would need to insert yourself physically into the transportation chain and do physical work to mess with the content. Messing with mail is also taken much more seriously as an offense in many places, while laws are not as strict for network traffic generally. For telephone conversations, at least until somewhat recently, the fact that synthesizing convincing speech in real time was not really feasible (especially not if you tried to imitate someones speech) ensured some integrity of the conversation. That has changed, though.