Who is Adam Back? Many people can't say for sure!
Hashcash was originally used to combat spam and denial-of-service attacks: senders had to solve a hash puzzle first.
In Bitcoin, tampering with past blocks means redoing the proof of work for every block that follows, making tampering extremely costly.
Verify information using multiple sources before taking action; don't just listen to one person's account.
$BTC 81495.36 (-0.16%)
Hashcash was originally used to combat spam and denial-of-service attacks: senders had to solve a hash puzzle first.
In Bitcoin, tampering with past blocks means redoing the proof of work for every block that follows, making tampering extremely costly.
Verify information using multiple sources before taking action; don't just listen to one person's account.
$BTC 81495.36 (-0.16%)