Vigenere and ACM Cipher

Deadline: 24 hours

For the Vigenere cipher:

The file [url removed, login to view] has two ciphertexts. The first used a key of length 3. The second has unknown keylength.

Submit a plaintext file called [url removed, login to view] that has FIVE lines in it:

- first 40 characters of the plaintext message of the first ciphertext

- key used to encrypt the first ciphertext

- first 40 characters of the plaintext message of the second ciphertext

- key used to encrypt the second ciphertext

- one line description of how you solved it.


For the ACM cipher:

Consider the encryption scheme specified here: [url removed, login to view]

In the file [url removed, login to view] decrypt the two messages. The first message also gives you the secret key. For the second word, you will need to find the key yourself. The keys for the second ciphertext have different lengths.

Submit a file [url removed, login to view], that has four lines:

secret key for first ciphertext (given)

plaintext message for first ciphertext

secret key for second ciphertext

plaintext message for second ciphertext

Compétences : Sécurité Informatique, Cryptographie, Sécurité Internet, Programmation, Sécurité Web

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Concernant l'employeur :
( 51 commentaires ) Ottawa, Canada

Nº du projet : #15514999