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weave in asymmetric cryptography formerly in ch3 as symm-key explainer

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Tammi L. Coles 2023-10-12 16:49:51 +02:00 committed by Heiko Schaefer
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book/source/03-cryptography.md
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@ -19,7 +19,7 @@ Here are two important properties of cryptographic hash functions:
## Symmetric-key cryptography ## Symmetric-key cryptography
[Symmetric-key cryptography](https://en.wikipedia.org/wiki/Symmetric-key_algorithm) uses the same cryptographic key for both encryption and decryption. Symmetric-key cryptographic systems support *encryption/decryption* operations. [Symmetric-key cryptography](https://en.wikipedia.org/wiki/Symmetric-key_algorithm) uses the same cryptographic key for both encryption and decryption, unlike asymmetric cryptography where a pair of keys is used: a public key for encryption and a corresponding private key for decryption. Symmetric-key cryptographic systems support *encryption/decryption* operations.
Participants in symmetric-key operations need to exchange the shared secret over a secure channel. Participants in symmetric-key operations need to exchange the shared secret over a secure channel.