Java S-DES (Simplified DES) i

Create a program to encrypt and decrypt binary files using S-DES (Simplified DES) in the

Cipher Block Chaining mode. The program takes the input of an initial key and an initial

vector, reads the plaintext or ciphertext from a file, conducts the encryption or

decryption, and writes the resulting ciphertext or plaintext into a second file.

You can use any of your preferred programming languages and operating systems. A

test case is as follows: using a binary initialization vector of 10101010, a binary plaintext

of 00000001 00100011 encrypted with a binary key of 0111111101 should give a binary

ciphertext of 11110100 00001011. Decryption should work correspondingly.

Input Format:

The program should take a command in the following format.

(java) mycipher -m mode -k initial_key -i initial_vector -p plaintext_file -c ciphertext_file

mode: can be only encrypt or decrypt

initial_key: 10-bit initial key

initial_vector: 8-bit initial vector

plaintext_file: a binary (not text) file to store the plaintext

ciphertext_file: a binary (not text) file to store the ciphertext

Output Format:

The program should print output in the following format.

k1=subkey 1

k2=subkey 2

plaintext=all bytes of the plaintext separated by blanks, starting from the first byte

ciphertext= all bytes of the ciphertext separated by blanks, starting from the first byte

Deadline Monday, February 25, 2013 8:00 AM

Taidot: Salaustekniikat, Java, tietojärjestelmäarkkitehtuuri

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Tietoa työnantajasta:
( 286 arvostelua ) Stavropol, Russian Federation

Projektin tunnus: #4274856

4 freelanceria on tarjonnut keskimäärin %project_bid_stats_avg_sub_26% %project_currencyDetails_sign_sub_27% tähän työhön


Please see PMB.

$45 USD 3 päivässä
(3 arvostelua)

I have experience in field of cryptography (DES, 3DES etc). This is some simple job for me. I will do this in .net if you are ok with it. i am ready to start.

$30 USD 2 päivässä
(1 arvostelu)

Cryptography is my major. I would like to take this project.

$35 USD 2 päivässä
(1 arvostelu)

I can help you.

$30 USD 3 päivässä
(0 arvostelua)

I can help you. Please see your PMB.

$30 USD 1 päivässä
(0 arvostelua)