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1. Decryption Speed
A certain cryptography vendor was providing an encryption technology that was breakable within 10 hours. Considering the continuous increase in computer speed, the company decided to increase the size of the encryption key so that the time to break the encryption become more than 250 hours. What should be the minimum key size increase to meet this objective?
Hint: Normally, the increase of a single bit in the size of the encryption key doubles the amount of needed computations.
2. Diffie-Hellman
You have agreed with your friend X that you will use the Diffie-Hellman public-key algorithm to exchange secret keys. You and X have agreed to use the public base g = 19 and public modulus p = 739. You have secretly picked the value SA = 5. You begin the session by sending X your calculated value of TA. X responds by sending you the value TB = 167. What is the value of your shared secret key? Show all your work.
3. Encryption
In a given encryption system where the messages are expressed only as numbers and "e" is an integer.
cyphertext = Part One: {int[(plaintext)^(1/e)]} Part Two: {plaintext -{int [(plaintext)^(1/e)]}^e}
Show how the recipient of the message, who knows "e", produces the plaintext.
Compare the array-based and link-based implementations of the ADT bag operation
A function (addBinary binaryList) that takes a list of binary numbers and returns their decimal sum. (addBinary '(1101 111 10 101)) returns 27.
A sorting algorithm is described as stable if equal elements are in the same relative order in the sorted sequence as in the original sequence.
Determine correct public keys for other party, and assuming that Eve can intercept any messages.
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Describe the need for complex data structures and how they are used. Describe the design and application of arrays and how the array simplifies program development.
Why is understanding Algorithm Efficiency so critical?
Assume you have a document called records.txt having the list of employee id and workers names. Every line contains a single employee id immediately followed by the employee name in the format Last name, First name.
Evaluate the average complexity of an enqueue operation. Determine the average complexity of the dequeue (remove) operation.
Construct a basic, generic structure of a web site. Name it something generic etc. Demonstrate some basic layout of the content of the pages.
Think about a computer system used to manage loans for a library. Libraries loan books, CDs, videos and magazines to registered members.
decision tree learninga describe the main steps in the basic decision tree learning algorithm. the table below contains
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