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The designers of the UNIX password algorithm used a 12-bit salt to perturb the first and third sets of 12 entries in the E-table of the UNIX hashing function (the DES). Consider a system with 224 users. Assume that each user is assigned a salt from a uniform random distribution and that anyone can read the password hashes and salts for the users.
What is the expected time to find all users' passwords using a dictionary attack?
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?
Assume that the passwords were eight characters long but that the salt length was increased to 24 bits. Again, the salts (and the corresponding algorithms) are known to all users. What would be the expected time to find all users' passwords using a dictionary attack?"
Clinet's MAC address is explicitly excluded in the AP/router configuration. What are the security vulnerabilities of this authentication scheme?
computer security incident, Trojan Defence, anti-forensics technique, chain of custody, FAT file system, SQLOracleHacks.txt, SQLOracleAttacks.txt, SQLInjection.html
How will your company ensure adequate destruction of the materials thus ensuring an individual's privacy? Will any state-wide, national, or industry standards be met? If so, which ones and how?
3G Safekeeping model, safekeeping architecture standards ITU-T X.805 and ISO/IEC 18028-2, access points (AP), network admission controller (NAC) and authentication server (AS)
Below are given of ciphertext, from Affine cipher. Determine the plaintext and key. Give a clearly written description of the steps you followed to decrypt each ciphertext.
Read and summarize "Big iron lessons, Part 5: Introduction to cryptography, from Egypt through Enigma"
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.
List at three key things employees should remember on data privacy, security practices, and the legal implications of data privacy. The document should be something which draws someone to look at it while still maintaining professional appearan..
You begin the session by sending Bob your calculated value of TA. Bob responds by sending you the value TB = 291. What is the value of your shared secret key?
Why would a variation of RSA encryption/decryption where a single prime number is used the modolus insecure? How can someone recover a message x from the encrypted value.
Show that a passive eavesdropper that observes a single execution of the protocol can recover key s and impersonate the tag.
Pseudo-random generators, pseudo-random functions and pseudo-random permutations
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