Exam 312-50 topic 5 question 31 discussion

None of the listed options is correct. Public Key Infrastructure (PKI) uses cryptographic algorithms at multiple levels to provide secure communication and trust among parties. At the core of PKI is the use of public key algorithms, also known as asymmetric cryptography, which use a pair of keys, a public key and a private key, for encryption and decryption. Therefore, the correct answer is: PKI uses public key algorithms such as RSA (with key sizes of at least 2048-bit strength or higher), hash functions, and symmetric key algorithms such as AES (with key sizes of 128 bits or higher).