What is an Asymmetric Key or Asymmetric Key Cryptography?

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What is an Asymmetric Key or Asymmetric Key Cryptography?

Asymmetric cryptography uses a pair of linked keys to secure data. One key, the private key, is kept secret by its owner, and is used for signing and/or decryption. The other, the public key, is published and can be used by anyone to verify messages signed by the private key or to encrypt documents to the owner of the private key.