## Cryptography | 3-DES implementation in C

In cryptography, Triple DES (3DES) is a symmetric-key block cipher, which applies the Data Encryption Standard (DES) cipher algorithm three times to each data block. Get great deals at Amazon

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In cryptography, Triple DES (3DES) is a symmetric-key block cipher, which applies the Data Encryption Standard (DES) cipher algorithm three times to each data block. Get great deals at Amazon

The Data Encryption Standard (DES) is a symmetric-key algorithm for the encryption of electronic data. Although now considered insecure, it was highly influential in the advancement of modern cryptography.

The extended Euclidean algorithm is an extension to the Euclidean algorithm, which computes, besides the greatest common divisor of integers a and b, the coefficients of Bézout’s identity, that is integers x and y such that ax + by = gcd(a,b)

Write a C/C++ program to find generators of cyclic group. A cyclic group is a group that is generated by a single element. That means that there exists an element g, say, such that every other element of the group can be written as a power of g. This element g is the generator …

Write a C/C++ program to solve given simultaneous pairs of Linear Congruence Equations using Chinese remainder theorem. The Chinese remainder theorem is a theorem which gives a unique solution to simultaneous linear congruences with coprime moduli. In its basic form, the Chinese remainder theorem will determine a number p that, when divided by some …

Write a C/C++ program to find general solution to given Linear Congruence Equation.

Write a C/C++ program to solve given simultaneous pairs of Linear Congruence Equations.

Write a C/C++ program to find general solution of Linear Diophantine equation. A linear Diophantine equation is a first degree (linear) polynomial whose solutions are restricted to integers.

The Vigenère cipher is a form of polyalphabetic substitution to encrypt alphabetic text by using a keyword. The Vigenère cipher is easy to understand and implement. It consists of several Caesar ciphers in sequence with different shift values.

Diffie-Hellman algorithm is used to establish a shared secret between two parties which can be used for secret communication for exchanging data over a public network.

The Euclid’s algorithm (or Euclidean Algorithm) is a method for efficiently finding the greatest common divisor (GCD) of two numbers. The GCD of two integers X and Y is the largest number that divides both of X and Y (without leaving a remainder).