Just speculating here, but it might be possible to leverage the hash rate and messages passed via Bitcoin’s blockchain for security.

Think something like OpenTimestamps. One idea could be that you set up a firewall that requires an extremely high proof of work before accepting packets. The firewall might be some specialized hardware for this.

If your message was passed inside a block you could use the PoW from that? The idea is to set the bar prohibitively high and the bar doesn’t get higher than the PoW applied to bitcoin.

Again just speculating. I imagine if the guy had a novel idea he wouldn’t divulge the advantage publicly…