Implement encryption and decryption of the vigenere cipher

Assignment Help Computer Network Security

Reference no: EM131375

1. Implement both encryption AND decryption of the Vigenere cipher with 26 English letters and 1 space character "_" in its tableau as shown in class. You may use any major programming languages.

2. The following cipher-text was encrypted using the Vigenere cipher with 26 English letters and 1 space character "_" in its tableau as shown in class:

tyxvahlvowsrahsoervceispsqlj_hxgyqfjtqgi_j___bafebacoewvowsohvs_nvet_dgo_tghidzvbklvodsjuhsjwdsmerwdnvkn_jgvrvv_ilxvhzevnelvodsohvsyhrfyeqga_yan_dgo_rloatcdnxsxujsmaj__rqgi_j___wtytqlcajsreq_wvvshauxvokjvpekdtzgi_kfwsitdlrugeqlceqxidqtidqtdmqga_ihtidzvidswlbsdtisailxvvrjdeja_sqan_afjwbxzgvsjfqlceqxiecqvadwvtyan_afjwbxzgvsyadsjnbqvbvszehaqeusdnqlceqydrilvidkoadv__wjjmqlceqvjnlxmtvwvsfqvhvfyeqao_zkveik_njawlqlcajsohvsyodn_rjxz_iht_sxvthxwtvwvwzlc_j___klhoilvlzu_rrddto

This cipher-text is also downloadable from this file .

The plaintext consists of several meaningful English sentences.

a). Try to decrypt this message. Write down your decryption procedure.

b). In general, how do you break the simple vigenere cipher?

3. Implement the 3-rotor machine with the wirings. Your implementation should be able to easily change a) the order of the 3 rotors b) the initial rotational positions of the rotors.

Reference no: EM131375

Questions Cloud

Implementation of sorting technique : Implementation of sorting technique

Find the transfer function for the impulse response : Find the transfer function for the following impulse response

Prepare a plan of action for capitalizing : Prepare a plan of action for capitalizing on one of your strengths

Print the contents of the array : Prepare a second loop that prints the contents of the array

Implement encryption and decryption of the vigenere cipher : Implement both encryption AND decryption of the Vigenere cipher with 26 English letters and 1 space character

Explain the term product costing : Explain the term product costing

Problems based on probability : What is the probability in the sample?

Accounting concepts and practices : Adopt an investment strategy that seeks to maximise both financial return

Draw the e/r diagrams for the business rules : Draw the E/R diagrams for the business rules

User Account

All Pages