Public-key cryptography: Difference between revisions

Revision as of 10:12, 19 January 2025

Revision as of 15:03, 20 January 2025

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{{short description|Cryptographic system with public and private keys}}

{{Use dmy dates|date=October 2019}}[[File:Public-key-crypto-1.svg|thumb|250px|right|An unpredictable (typically large and [[random]]) number is used to begin generation of an acceptable pair of [[cryptographic key|keys]] suitable for use by an asymmetric key algorithm.]]

{{Use dmy dates|date=October 2019}}

[[File:Private key signing.svg|thumb|250px|In this example the message is [[digitalDigital signature|digitallySignature signedStandard|Wcampbell]] with Alice's private key, but the message itself is not encrypted.

{{more citations needed|reason=article with large unreferenced sections|date=January 2024}}

[[File:Public-key-crypto-1.svg|thumb|250px|right|An unpredictable (typically large and [[random]]) number is used to begin generation of an acceptable pair of [[cryptographic key|keys]] suitable for use by an asymmetric key algorithm.]]

[[File:Private key signing.svg|thumb|250px|In this example the message is [[digital signature|digitally signed]] with Alice's private key, but the message itself is not encrypted.

1) Alice signs a message with her private key.

2) Using Alice's public key, Bob can verify that Alice sent the message and that the message has not been modified.]]