Question about substitution ciphers

Assignment Help Computer Network Security

Reference no: EM1381213

Think about two substitution ciphers. One adds a value of i to the ASCII code of the plaintext character. The other adds a value of j to the plaintext character. All additions are modulo 256.

Now consider a double-encryption method that adds i to each plaintext character and then adds j to the resulting ciphertext character to get another ciphertext character. Again, all calculations are modulo 256.

How much more secure is this double encryption when compared with either single-encryption method?

Reference no: EM1381213

Questions Cloud

Increment value in one cell in excel : Discuss how to increment value in one cell in Excel if another cell is populated. or example, I have cell A that has values such as 1, 2, 3, 4 etc...

How will you personally balance this shift : how will you personally balance this shift in the organizations' direction, with your biblical worldview?

Soapscum window washing wants to keep track : Soapscum Window Washing wants to keep track of its employees and the projects to which they are assigned. They need to keep track of some basic employee contact information

Determine the optimal linear predictor : Determine the optimal linear predictor for a given order N and DPCM simulation and write a graphical user interface that has least the following functions

Question about substitution ciphers : Think about two substitution ciphers. One adds a value of i to the ASCII code of the plain text character. The other adds a price of j to the plaintext character. All additions are modulo 256.

American apparel, known for its hip line of basic garments : American Apparel, known for its hip line of basic garments and its provocative advertisements, is no stranger to the concept of "doing it all". American Apparel has made vertical integration a central part of its strategy

We looked at surveys as a means of developing data using : We looked at surveys as a means of developing data using linear programming. In the Management Sciences Association example, we looked a survey requiring significant preparation

Determine the value of the symmetric key : Discuss some of the attacks on the Diffie Hellman key exchange protocol we discussed in the lecture. Present your solution for avoiding such attacks.

The maker of the world famous chocolate chip cookies needs : the maker of the world famous chocolate chip cookies needs to design a product layout for a new product, mint chocolate chip. the company plans to use this new production line eight hours a day in order to meet projected demand

User Account

All Pages