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Informally speaking, a MAC is secure if no efficient forger can generate any valid (message, tag) pair, even if the forger is given a tagging oracle. (As we discussed in class a tagging oracle is an algorithm that will tag arbitrary messages for an attacker.)
Consider a MAC technique called CBCMAC. The algorithm takes a message, m, a secret key, k, and runs CBC mode encryption on the blocks of the message. For purposes of this problem the initialization vector will always be zero. The tag is the final block of the ciphertext.
Demonstrate that this MAC scheme is not secure for variable length messages. Write pseudocode for an algorithm, F, that, given a tagging oracle Tk(m), can easily generate a (message, tag) pair for a message that was not sent to the tagging oracle.
Analyse security procedures
TCO C states "Given a computer network for data transmission, identify and analyze possibilities for loss or modification of data. Write down the vulnerabilities of RPC? What are the present methods of securing RPC?
The pattern or generator is P 1001. Calculate the CRC or FCS for the sender. You must give the details of this calculation.
How can we apply division method to calculate hash value of character string without using more than constant number of words of storage outside string itself?
How are many chunks of code from many organizations really going to work together to provide a secure and reliable computing environment?
Implement buffer overflow in c++ And attacking the devises by doing buffer overflow.
What is the ciphertext (in binary form) generated by the encryption of character D? How is plaintext for this encrypted D recovered?
Total Cost of Ownership Return on Investment. Explain each of these approaches, state your preference, and analyze the advantages and disadvantages of each with a focus on IT investments.
Students would enter the room, pick up their jobs, and leave. What kinds of security problems might computer services encounter with a system such as this?
Recall that a computer virus is malware that relies on someone or something (other than itself) to propagate from one system to another. Write a computer virus that can be written to other empty text documents by running the batch program.
Compare U.S. and E.U. policies and underlying philosophies of privacy. Include references to monitoring and privacy in the workplace, surveillance, and disclosure/data privacy. In your estimation, could self-regulation be effective or does it need to..
Use whois at Network Solutions, netsol.com and/or whois.arin.net to find contact information and DNS servers for one organization. Also find the IP address range for their network. Print your results.
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