Cryptography in C and C++, Second Edition

Chapter 17. An Application Example: The RSA Cryptosystem

The next question was the obvious one, "Can this be done with ordinary encipherment? Can we produce a secure encrypted message, readable by the authorised recipient without any prior secret exchange of the key etc?" . . . I published the existence theorem in 1970.

——J. H. Ellis, "The Story of Non-Secret Encryption"

As we approach the end of our story we would like to investigate the possibility of testing what we have labored over chapter by chapter against a realistic and current example, one that clearly demonstrates the connection between the theme of cryptographic application and the deployment of our programmed functions. We shall make a brief excursion into the principle of asymmetric ...