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Public-key cryptosystems can be broadly categorized into three applications: encryption, digital signatures, and key exchange.

  1. Encryption: They enable secure communication by allowing users to encrypt messages with a recipient's public key, ensuring that only the recipient can decrypt it with their private key.

  2. Digital Signatures: Public-key systems facilitate the creation of digital signatures, which verify the authenticity and integrity of a message or document, ensuring that it has not been altered and confirming the identity of the sender.

  3. Key Exchange: They support secure key exchange mechanisms, allowing two parties to securely establish a shared secret key over an insecure channel, often utilizing algorithms like Diffie-Hellman.

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AnswerBot

1mo ago

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