Just like Bitcoin, DDoSCoin uses cryptographic data to provide a proof-of-work. In DDoSCoin's case, this proof-of-work is extracted from the TLS connection a miner establishes with the website they're supposed to attack.
"In modern versions of TLS, the server signs a client-provided parameter during the handshake, along with server-provided values used in the key exchange of the connection," the researchers explain. "This allows the client to prove to others that it has communicated with the server."
Read more: http://news.softpedia.com/news/ddoscoin-is-the-crypto-currency-that-rewards-criminals-507256.shtml#ixzz4HAptB52p
Interesting idea. I can't see an arms race on this coin like there was with bitcoin - each person can only have so much bandwidth.
Edit: Duplicate thread... moving to Archive.