Information security on the Internet and cryptography
Answers are for parents and teachers.
1
In RSA with p = 3 and q = 17, find n.
51
2
In RSA with p = 7 and q = 13, find φ = (p–1)(q–1).
72
3
For p = 7, q = 13, e = 5, d = 29, find e·d. (Then check that its remainder on division by φ = 72 is 1.) What is e·d?
145
4
Encrypt the word “maktab” with the Caesar cipher (k = 3).
pdnwde
5
Check three privacy settings in your social network profile and write what you changed.
Student's answer: for example making the profile private, turning off location, limiting who can message you.