Practical Cryptography

2CLASSICAL CRYPTOGRAPHIC ALGORITHMS

SHEIKH SHAUGAT ABDULLAH AND SAIFUL AZAD

Contents

Keywords

2.1 Caesar Cipher

2.1.1 Algorithm

2.1.2 Implementation

2.1.3 Limitations

2.2 Monoalphabetic Cipher

2.2.1 Algorithm

2.2.2 Implementation

2.2.3 Limitations

2.3 Playfair Cipher

2.3.1 Algorithm

2.3.2 Implementation

2.3.3 Limitations

2.4 Polyalphabetic Cipher

2.4.1 Algorithm

2.4.2 Implementation

2.4.3 Limitations

Keywords

Caesar ciphe

Monoalphabetic cipher

Playfair cipher

Polyalphabetic cipher

The history of cryptography starts from the ancient era when it was practiced by the secret societies or by the troops on the battlefield. The necessity of such an approach has increased with time. In the current information era, there is indeed no time at which information ...