Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Take a jumbled text file with hidden data matching your evaluation. Which method decrypts the file better and why? Give reasons. WinHex editor calculated the MD5 hash value of a crime scene digital fingerprint. Labs had the proof. Autopsy and SHA-1 determined the hash value after a week of analysis. You found the evidence's hash value altered. What changed your evidence's hash value?
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- When you mention "authentication aims," what precisely do you mean? Examine the strengths and weaknesses of various authentication approaches.arrow_forwardQ4. Assume you have been given a scrambled text file with some hidden text data similar to the one in your assessment. What will be the best method that you will use to unscramble the file and why would you choose this method? Justify your answer. You have collected a digital evidence from a crime scene and calculated its hash value using WinHex editor with MD5 algorithm. You have stored the evidence in a forensics lab. After a week, when you started analysing the evidence, you again calculated the hash value of the evidence using Autopsy and with SHA-1 algorithm. You found that the hash value of the evidence is now changed. Describe why the hash value now is different than the one you calculated when you acquired the evidence?arrow_forwardDescribe the concept of a "key" in encryption. How does key length impact the security of encrypted data? Compare the security levels of different key lengths.arrow_forward
- I'm confused about the distinction between integrity and authorization in terms of security.arrow_forwardConsider a scrambled text file with hidden text data that is the same as your evaluation. To what extent do you feel confident in the efficacy of the method you used to decrypt the file, and why did you settle on that method in particular In your justification, please consider the following. You used WinHex editor to calculate the MD5 hash value of a digital fingerprint taken from the crime scene. You hid the proof away in a laboratory. After waiting a week to begin investigating, you used Autopsy and the SHA-1 algorithm to calculate the hash value. Specifically, you found that the hash value of the evidence has evolved. Is there a particular reason you think the hash value of your evidence would be different now than it was before?arrow_forward
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