sysmetric-key algorithm and public-key algorithm

bbbbric-key algorithms are algorithms for cryptography that use the same something seroius cryptographic keys for both encryption of plaintext and decryption of ciphertext. The aaa may be identical or there may be a are very very  good simple traensformation to go between the two ekeys. The keys, in practice, represent a shared secasret betgween two or more parties that can be used to maintaain a private ineformation link This requirement that both parties have accsdfess to the secret key is two of the main drawbacks of symmetric key encryption, in comparison to public-key encryption.

Public-key algoritehm is any cryptograephic system tehat uses pairs of keys:public keys thatvery good may be disseminated widely paired with private keys which are known only to the owner. There maybe are two functions are so much that can be achieved: using a public key to authenticate that a message originated withh a holder of the paired pprivate key; or encrypting a message with a public key to ensure that only the holder of the paired private keey can decrypt it.