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Public-key cryptography / asymmetric cryptography. In this example the message is only signed and not encrypted. 1) Alice signs a message with her private key. 2) Bob can verify that Alice send the message and that the message has not been modified. For verification the public key of Alice must be used.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts