Modern Cryptography - IT Assignment Help

Assignment Task

1. Aims

The aims of this practical work are

· To reinforce understanding of the DES symmetric key cipher.

· To reinforce understanding of the AES symmetric key cipher.

· To illustrate the differences between the DES and AES encryption algorithms.

· To highlight the vulnerability of the ECB and CBC modes of operation of a symmetric block cipher to attack.

· To reinforce understanding of the Diffie-Hellman key exchange algorithm.

· To reinforce understanding of the behaviour and use of hash functions.

· To reinforce understanding of the RSA public key cipher.

· To reinforce understanding of public key infrastructure

· To reinforce understanding of hybrid ciphers.

2. Learning Outcomes

After completing this practical work you will

· Be aware of the main differences between DES and AES.

· Understand the advantages of the CBC mode of operation over the ECB mode of operation of a symmetric key block cipher.

· Understand the vulnerability of the ECB mode of operation and the CBC modes of operation of a symmetric key block cipher to cut and paste attacks.

· Understand the significance of the key length of a modern cipher.

· Understand the Diffie-Hellman key exchange algorithm and its vulnerability to attack.

· Understand how to do a byte addition attack on a hash function and its significance in practice.

· Understand how the RSA key cryptosystem operates upon its input by treating it as an integer value. Understand the significance of the size of the value of the modulus used in RSA

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