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Question 1. Explain, using an example, how the adversary can modify the seventh bit of a ciphertext generated using a block cipher (e.g., AES) in CBC mode in such a way that the change in the corresponding message is small and easily predictable by the adversary. (The adversary has no access to the decryption key.)
Question 2. How can a message authentication code (MAC) be used to determine the au- thenticity of a message? (Show (1) which steps the sender and receiver follow, (2) what is transmitted, and (3) why these steps guarantee message authen- ticity.)
Question 3. Explain how a ciphertext generated using the substitution cipher can be decrypted without knowing the decryption key.
Question 4. Before HMAC was proposed, it was quite common to use MACk(m) = H(k||m) where H is a collision-resistant hash function. Show that this is not a secure MAC when H is constructed via the Merkle-Damga ¨rd transform.
List and discuss two cases or examples where you would convert a text string to a numerical data?
Discuss three secrets that you can evaluate the relationship between your manager and his employees including yourself.
Describe how to modify any balanced tree data structure such that search, insert, delete, minimum, and maximum still take O(log n) time each, but successor and predecessor now take O(1) time each. Which operations have to be modified to support th..
Discuss communication in Unix vs other communication tools we use outside of the operating system (example:text, IM). Discuss anything you have read in Information Systems this past week or tell me what is on your mind about Information Systems.
You are sending the following text message: "GOOD!" Using ASCII and odd parity, your processor prepares the following bit stream:
Fifty tickets, numbered consecutively from 1 to 50 are placed in a box. Four tickets are drawn without replacement. What is the probability that four odd numbers are drawn?
How can you ensure that customer expectations are met by your project team? Why should the project manager have good negotiation skills? What should a project manager do in case there are deviations in project execution? Why is rapport building wi..
discuss at least three of the Dos and Don'ts of developing a security report. Please ensure to do so according to the requirements of the assignment.
The Campbell Soup Company is on a mission to create value in the minds of consumers. Value is the customer's subjective assessment of benefits relative.
We learned there are several tasks that are usually automated and implemented through the resource management system.
The assignment is to prepare a general plot that enables one to calculate the drag coefficient for flow past any submerged object as long as the sphericity can be calculated. This is needed to calculate the pressure drop from Eq. (1). The y-axi..
In June 2010, Stuxnet, a complex and highly sophisticated computer worm was discovered by Kaspersky Lab. Stuxnet targeted Siemens industrial Supervisory Control and Data Acquisition (SCADA) systems. It was reported that the worm appeared to target Ir..
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