Why use encryption for emails if you have to share the public key?

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Why would you use something like PGP if you have to send your encryption key unencrypted to the party you are sending to? And if you leave this key out on something like Twitter for example, couldn’t law enforcement or a third party if they gained access to the other persons email still read the contents of the encrypted email by using this key? Doesn’t this defeate the purpose of using encryption?

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33 Answers

Anonymous 0 Comments

Imagine a door with a small door in it.

The big and small door both have separate locks. You share the key to the small door with everyone you want to communicate with, so when they want to send you something they come to the small door and open the lock and push whatever they need to inside but the door is designed in such a way that things can only go in but not out.

The second key, which is to the big door is yours and yours only. So when you want to check you got, you come and open it and access whatever is inside.

I hope this makes it easy to understand.

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