Affine Ciphers and Modular Inverses
Agent Smith, in this lesson you will see a stronger connection between math and codes. You will learn a more secure type of cipher. However, with increased security comes the need for skill in using it and a deeper understanding of arithmetic in this new modular system. These affine ciphers are much harder to crack without a knowledge of multiplication and its inverses in mod 26.
But alas, agents are human, and they can make errors that render a cipher useless. We'll tell you about one of those mistakes in this lesson and try to prepare you so that you don't make one like it.
Goals for Lesson 6
Are you wondering what goals you will pursue during this lesson?
Check out Lesson 6 Goals.
Ready for some readiness exercises?