- Oct 14, 1999
- 11,960
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I understand that there is a private and a public key. The public key is given freely out to the rest of the world. The private key is needed to decode the information from the public key. But if someone knows the public key then why is their message safe in any way, and why can't one decode the information back to the original message from the public key? It doesn't make sense to me.