The decode the receives sequence “3,2,5,7,8,5,3,6,10,9,5,6,12,11,5” using lzw dictonary coading if the initial dictonanry has four entries {a,e,o,u} in their alphabetical sequence.
Cryptography Assignment
In this attack, Trudy intercepts Alice’s message “I am Alice” and records the message and the value of R. Trudy then sends the same message and R value to Bob. When Bob sends the challenge E(R,K(ab)) to Trudy, she can simply forward this message to Alice, who will encrypt it and return the result to Trudy. Trudy can then forward the encrypted message back to Bob, who will accept it as proof of Alice’s identity.
Symmetric-key cryptography
Symmetric-key cryptography is a cryptographic technique that uses a single secret key to both encrypt and decrypt data. This key is shared between the sender and receiver of the encrypted information, hence the name “symmetric” key cryptography.