This problem uses a real-world example of a symmetric cipher, called transposition cipher. Please take a look at the descriptions on Wiki: https://en.wikipedia.org/wiki Transposition_cipher The following youtube video is also helpful to explain the procedures of doing this: https://www.youtube.com/watch?v=kk3mEDZdxU Then answer the following questions: a. Using the two keys (memory words) cryptographic and network security, encrypt the following message: Be at the third pillar from the left outside the lyceum theater tonight at seven. If you are distrustful bring two friends." Make reasonable assumptions about how to treat redundant letters and excess letters in the memory words and how to treat spaces and punctuation. Indicate what your assumptions are. b. Decrypt the ciphertext. Show your work