Download presentation
Presentation is loading. Please wait.
1
Public Key Cryptography
2
Ken Coder Ken Coder wants to send a message to his sister,
3
Dee Coder Dee Coder. But they have a problem.
4
Yves Dropper Yves Dropper reads all their mail!
5
Ken's idea I will lock my message in a box.
6
Yves can't open it Then Yves Dropper will not be able to open it.
7
Neither can Dee. Unfortunately, neither can Dee.
8
Ken sends a secret key No problem! says Ken. I will send Dee my secret key.
9
Yves reads all the mail! But Yves reads all the mail, and copies the key.
10
Ken sends the box… Then when Ken sends the box…
11
Yves can read the message.
But Yves can read the message too.
12
Dee's Idea I have an idea, says Dee.
13
A box with 2 keys I will make a box with two keys!
14
One key for locking the box…
15
and one key for unlocking the box!
16
Send everyone the locking key
17
Keep the unlocking key
18
Diffie & Hellman Public Key Cryptography
19
2 Keys
20
One Encoding Key
21
One Decoding Key
22
Public Key Directory
23
Private Keys stay private
24
Anyone can send a secret message!
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.