Safecoin: Gold, Silver & Copper

[digipl]

We ask, a year ago, about the possibility of safecoin spam. Irvine replied:

@dirvine

In terms of the vandalism or traffic attack described then it is on the attacker to sign the transaction (which is computationally more heavy that checking) so the way to defeat this kind of DOS thing (or traffic amplification attack) is to make it cheap for the network and expensive for the attacker. I think we are OK there.