Public-Key Encryption

Public-key encryption is a technique that uses a pair of keys, a public key for encryption and a private key for decryption, to securely transmit data.

Public-key encryption is considered more secure because it uses different keys for encryption and decryption, making it more difficult for attackers to decipher the encrypted data.

The advantage of using public-key encryption is that key distribution is easier compared to symmetric encryption, as there is no need for a complex handshaking process with key distribution centers.

<p>The same algorithm with the same key is used for encryption and decryption. The sender and receiver must share the algorithm and the key.</p> Signup and view all the answers

<p>The key must be kept secret. It must be impossible or at least impractical to decipher a message if the key is kept secret. Knowledge of the algorithm plus samples of ciphertext must be insufficient to determine the key.</p> Signup and view all the answers

<p>One algorithm is used for encryption and a related algorithm for decryption with a pair of keys, one for encryption and one for decryption. The sender and receiver must each have one of the matched pair of keys (not the same one).</p> Signup and view all the answers

<p>One of the two keys must be kept secret. It must be impossible or at least impractical to decipher a message if one of the keys is kept secret. Knowledge of the algorithm plus one of the keys plus samples of ciphertext must be insufficient.</p> Signup and view all the answers

<p>In public-key encryption, the sender and receiver do not need to share the same key, making key distribution easier.</p> Signup and view all the answers