Describe the different categories of symmetric encryption algorithms. Outline the symmetric encryption process and explain the components involved in the process. What is cryptanalysis? Give an example of a cryptanalytic problem. Describe how a simple substitution cipher works, like the Caesar cipher. Describe the components of a digital stream cipher. Why do modern security systems avoid using RC4? What is the difference between a stream cipher and a one-time pad? Explain the relationship between modular arithmetic and the Caesar cipher. How do data errors in ciphertext encrypted with a stream cipher affect the decrypted plaintext? Summarize the different situations in which people use file encryption software. Compare the behavior of built-in Windows file encryption with using a separate encryption application program. Describe the steps performed when a file encryption program encrypts file. Describe the steps performed when a file encryption program decrypts a file. Why should a file encryption program overwrite the plaintext in a file after the file has been encrypted? Summarize basic considerations for secure, trustworthy software. Summarize the basic security features of a well-written file encryption program