RSA-DES

RSA-DES Encipher for Principles of Information Security 2019 Fall @ Fudan University, by Zuobai Zhang

Introduction

This is the mid-term project for our Information Security course. In this project, I have implemented the DES method using javascript. You can visit this website to use my encipher or you can open the DES.html to run locally. Furthermore, we implement the RSA algorithm to encrypt the key of DES and the new version is on this website or open the RSA-DES.html to run locally.

Example

As an illustrative instance, you can apply the DES algorithm on the following test case:

plaintext: 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111

key: 00010011 00110100 01010111 01111001 10011011 10111100 11011111 11110001

initial vector IV: 0000000000000000000000000000000000000000000000000000000000000000

Then, you will get the answer:

ciphertext: 0101010010101100110000000011110001001011000110000111010001001001

encrypted initial vector IV: 1110000111000011101101011100111010101101001110110001000101100101

After that, you can click the button '检验DES' to check the correctness of the DES algorithm.

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As for RSA algorithm, you can first click the button '生成密钥对' to generate a pair of primes P and Q as:

P: 1110010101110000111101101010011000111111001100010101110001001101

Q: 1101101111111101001110011100101100001001111001010011111000101111

n: 11000101001010101001011101110000000110101011100010110110000110000010011100110011001001010100100011010100010010111001100000100011

e:65537

d: 110100000111110010111101001011011111100111010011101000000001100000000110111111010100000110111010001110101010010110001010001001

key: 1000100010001000100010001000100010001000100010001000100010001000

cipher_key(after RSA): 1011100100100001110001101001011001011000111110110110010111001000011111100110100101001000001000100111111000111100101010110100000