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Public-key cryptography / asymmetric cryptography, shared secret agreement. Alice combines her own private key with Bob's public key to create a shared secret. Likewise Bob combines his own private key with Alice's public key and gets the same shared secret. This secret is now only known by Alice and
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Public-key cryptography / asymmetric cryptography, shared secret agreement. Alice combines her own secret key with Bob's public key to create a shared secret. Likewise Bob combines his own secret key with Alice's public key and gets the same shared
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operations: Creating a key pair, encrypting, signing, and creating a shared secret. Note that no single cryptosystem can do all three operations: For instance RSA can do encryption and signing, while Diffie–Hellman can create shared secrets.
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Bob. The shared secret can be used as a symmetric key for encrypted communication between Alice and Bob and for many other purposes such as MACing and to create multiple message keys etc.
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This image is part in a series of images showing the four basic
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copyrighted, dedicated to the public domain by copyright holder
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released into the public domain by the copyright holder
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released into the public domain by the copyright holder
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Commons is a freely licensed media file repository.
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An easier, yet more secure way to utilize the tools
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
