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Let DES(x, K) represent the encryption of plaintext x with key K using the DES cryptosystem. Suppose y = DES(x, K) and y' = DES(c(x), c(K)), where c(·) denotes the bitwise complement of its argument
Name at least three factors that have lead to what some authors describe as the "explosive growth" in digital crime and cyber victimization. Provide some examples of what an individual can do to reduce the chance of becoming a victim.
Information has many facets: value, confidentiality, integrity, privacy, legality, and so on. All information is not the same and hence its protection requirements may vary.
Email viruses are typically launched by people who modify header information to hide their identity. Brightmail's Enrique Salem says that in the future
Bob is concerned about the possibility of having his 100k byte file modified without his knowledge, so he calculates a 100 byte hash. Alice, unbeknownst to Bob, changes a single character in Bob's file.
Describe network crimes that are related to DNS entry alteration or bogus DNS servers. In a network investigation, some network administrators may be cooperative while others may not.
Host the discussion with IT director and staff and let them know what you believe to be most significant of these extra complexities and reasons why you believe them to be difficult to manage.
Answer the following in relation to a scenario where Bob and Alice use Kerberos for mutual authentication. When Bob receives a ticket from Alice, how does he know it is genuine?
Any cipher system that needs to avoid encrypting certain messages should be avoided like the plague - what do you have to say for yoursel
What is the difference between message confidentiality and message integrity? Can you have confidentiality without integrity? Can you have integrity without confidentiality? Please be specific and justify your answer.
The state crime lab training coordinator is concerned with level of expertise at its Blacksburg, VA location and would like to contract DC Investigative to conduct four training sessions.
You are investigating a case involving an employee who is allegedly sending inappropriate photos via e-mail in attachments that have been compressed with a zip utility.
Assume that eight more characters were added to the password and that the DES algorithm was changed so as to use all 16 password characters. What would be the expected time to find all users' passwords using a dictionary attack?
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