A security administrator at a mid-size company is selecting an algorithm for secure email encryption that relies on a public/private key pair rather than a shared secret, to implement digital signatures as well. Which of the following algorithms satisfies this requirement?
RSA
RC4
Blowfish
AES
RSA uses mathematically linked public and private keys to encrypt or sign data, making it an asymmetric algorithm. The other listed algorithms-AES, Blowfish, and RC4-are all symmetric ciphers that rely on the same shared key for both encryption and decryption.
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