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Chapter 5. Cryptography > Modern Cryptographic Tools

Modern Cryptographic Tools

Although very efficient electromechanical cryptographic systems existed, such as the Enigma that enables a highly secure means of communication for a period of time, the advent of computer systems of steadily advancing strength and complexity quickly rendered these systems obsolete. Such systems were not completely compliant with Kerckhoffs’ Principle and still largely depended on security through obscurity in order to protect the data they processed.
To truly be able to use open cryptographic algorithms, new technologies were developed that depended on very difficult mathematical problems, sometimes referred to as one-way problems. One-way problems are generally easy to perform in one direction but very difficult to perform in the other direction. Factorization of very large numbers is an example of a one-way problem. Such problems form the basis of many modern cryptographic systems.

  

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