Question: What cryptographic methods are utilized by S / MIME , PEM, and PGP to secure email communications? Group of answer choices Block chaining and hashing

What cryptographic methods are utilized by S/MIME, PEM, and PGP to secure email communications?
Group of answer choices
Block chaining and hashing algorithms
Password-based authentication and simple mail transfer protocol
Digital signatures, public-key cryptosystems, symmetric key encryption, and specific ciphers like IDEA
Steganography and tokenization techniques

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