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The issue with these sorts of HashCash schemes is that legitimate users need to PoW their messages on a battery powered phone with a basic CPU and GPU. Spammers
by kijiki 5y ago
The issue with these sorts of HashCash schemes is that legitimate users need to PoW their messages on a battery powered phone with a basic CPU and GPU. Spammers can use big, mains-powered GPUs, or better yet, botnets full of stolen CPU-time from mains-powered desktops/servers/etc.