Galperin Y An Image Processing Tour of College Mathematics 2021

Textbook in PDF format

Cryptography is the practice and study of secure communication. In the old times, cryptography was all about writing messages that intruders couldn’t read or understand. People wrote ciphers and keys and worked hard to decrypt and encrypt important notes. Cryptography was confined mostly to military and diplomatic activities, while regular people didn’t have much to do with it in ordinary life.
With the development of modern cryptography, we are now surrounded by its codes everywhere.
Every message you send over your phone is encrypted. Our banks, schools, and governments rely on secure encryptions. With its prominence in our daily lives, it’s a good idea to learn a thing or two about cryptography - not to mention interesting!