A cryptographic method that uses multiple substitution alphabets to encrypt plaintext. In [[Monoalphabetic rotation ciphers]] each letter in the [[Plaintext]] is always substituted with the same letter in [[Ciphertext]] In a polyalphabetic substitution cipher, substitution depends on the position of the letter and a key. This makes polyalphabetic substitution ciphers more secure. #Cybersecurity #TerminologyDefinitions #ConceptExplanation #Beginner