Written by 4.2 Symmetric cryptosystems To recap from Chapter 2, Secure Channel and the CIA Triad, confidentiality is achieved using functions fK : ℳ→𝒞 that transform the private information m, also referred to as plaintext, into a scrambled message c = fK(m), referred to as ciphertext. Here, fK is an encryption function. It maps a plaintext m […]