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Consider the following symmetric encryption scheme (KG,E,D), which uses a pseudo-random permutation P, and a message authentication scheme (Gen, Tg,Vrfy) with unique tags. The key generation algorithm KG returns randomly chosen keys k1, k2. On input keys k1,k2 (returned by KG) and message m, the encryption algorithm E randomly chooses r, computes x=(r, m xor P(k1;r)) and returns ciphertext c=(x,Tg(k2;x)). On input keys k1,k2 (returned by KG) and ciphertext c, the decryption algorithm D writes c as (c1,c2), verifies whether Vrf(k2;(c1,c2))=1; if yes, it writes x as (x1,x2) and returns message m'=P(k1;x1) xor x2, otherwise it returns an error message. Which is the strongest security notion satisfied by the scheme (KG,E,D)? A. Security in the sense of indistinguishability B. Security in the sense of indistinguishability with chosen message attack C. Security in the sense of indistinguishability with adaptive chosen message attack D. Security in the sense of indistinguishability with chosen ciphertext attack Please explain your reasoning.
A discussion of the current trend to use electronic monitoring to measure employee productivity, bearing in mind the theories of Taylor and McGregor. The key ethical issues and the stakeholders involved.
You are a DBA for corporation's databases. The management has decided to increase security by applying database auditing yet they are unspecific what actions to audit.
Write a method called median that accepts an array of integers as its argument and returns the median of the numbers in the array. The median is the number that will appear in the middle if you arrange the elements in order
What functions are used instead of the >> and
Write the function Xsort wich takes in a list of strings and returns sorted list with all words beginning wih "X" first in the list. f.ex: xsort (['kex', 'xylofonn', 'epli', 'xenos', 'asni']) returns ['xenos', 'xylofonn', 'asni', 'epli', 'kex'] th..
First Name, Last Name, Phone Number, email address (add additional elements as desired) 2. Include a search criteria based on last name or any of the elements created for your phone book entries in order to retrieve the information requested.
Answer from the perspective of the airlines and from the perspective of the customers. What people, organization, and technology factors are responsible for excessive bumping problems?"
Security budgets is devoted to decreasing risk of malicious attacks. What threats are you aware of when it comes to the personal systems and systems at job
How do the NIST criteria for selection of DES and AES relate to Shannon's original standards of a good cryptographic system?
What is the output of the following program?
What is ASCII or EBCDIC? What part do the aforementioned things play in hashing? What is the formula for the PPD? What does the numerator and denominator say about the potential performance issues of this metric?
Assuming that the page file is stored in a Solid State Drive (SSD) and the Translation Look-aside Buffer (TLB) is stored in cache, what is the Effective Access Time (EAT) of a memory access in a memory subsystem
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