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Dsigners of UNIX password algorithm used 12-bit salt to perturb first and third sets of 12 entries in E-table of UNIX hashing function (the DES). Let system with 224 users. Suppose that each user is allotted salt from uniform random distribution and that anyone can read password hashes and salts for users.
Determine the expected time to find all users' passwords using dictionary attack?
suppose that eight more characters were added to password and that DES algorithm was changed so as to use all 16 password characters. Determine expected time to find all users' passwords using dictionary attack?
Suppose that passwords were eight characters long but that salt length was increased to 24 bits. Again, salts (and corresponding algorithms) are known to all users. What would be expected time to find all users' passwords using dictionary attack?"
As web developers, we must find out which scripting language is supported by the web server to understand what kind of rights and privileges we must take into account.
Describe how the greater reach of telecommunication networks today affects the security of resources which an organisation provides for its employees and customers.
Assume that no packet or acknowledgement are dropped. Assume that A sends a packet to C and waits for its acknowledgement to come back from C. How long does it take until A gets that acknowledgement?
This assignment explains the networking features, different kinds of networks and also how they are arranged.
When troubleshooting a motherboard, you find out the modem port no longer works. What is the best and least expensive solution to this problem?
Suppose that initial values of cache tags and cache lines are completely arbitrary, illustrate which accesses will lead to hit, and which will cause to miss.
Corporation is expanding from single physical location to three physical locations distributed across county to better serve the requirements of their customers.
Using Ethernet Network Interface Cards or NICs, diagram simplest connection between two computers which will allow for communications and resource sharing.
What possible IEEE 802.11 amendments could be used for the new system? What are the pros and cons of each amendment? Choose an amendment to implement and explain your choice.
CBC-pad is a block chiper mode of operation used in RC5 block cipher, but it could be used in any block cipher. That is, if the original plaintext is an integer multiple of the block size, why not refrain from padding?
What characteristics or issues would be pertinent or applicable for implementing this system? Be sure to discuss political, socio-economic, language, currency, educational and any other issues you think are pertinent.
Your boss has just heard about some nefarious computer activities known as ping sweeps and port scans. He wishesto know more about them and what the impact of these activities might be on company.
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