Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Why are timestamps used in the Kerberos protocol? Assume that Alice shares a secret s with her company's server computer. When Alice is on a trip, she tries to store an important message in the CEO's account directory. This message needn't be encrypted since confidentiality is not important here, but the CEO needs to be guaranteed that the message really is from someone who knows the secret s (e.g. Alice) when the CEO opens his/her computer the next day. A naïve protocol to achieve this may look like this: Alice-->Server: "This is Alice, I have an important message to forward to the CEO" Server-->Alice: "OK, please encrypt R" (where R is a random nonce) Alice-->Server: "Es(R)" (that is, R is encrypted with the secret s) Server-->Alice: "Please send the message" Alice-->Server: "The CEO needs to attend a meeting in Liverpool on May 1, 2006" The server stores this message in the CEO's directory Is this protocol secure? If not, how do you feel it could be modified to make it so?
Discuss some of the problems NATs create for IPsec security. (See [Phifer 2000]). Can we solve these problems by using IPv6? Why deployment of IPv6 has been slow to date. What is needed to accelerate its deployment?
Users are familiar with some network services like HTTP (Hypertext Transport Protocol) - Web, NNTP (Network News Transport Protocol). How do they figure into organizational security?
Segmentation of a file and forming FTP datagrams: Read first 'x' number of bytes and use them as part of payload section of an FTP datagram. Encapsulate the FTP datagram into TCP datagram (generation of TCP packets)
the following ciphertext which was encoded with a shift cipher: xultpaajcxitltlxaarpjhtiwtgxktghidhipxciwtvgtpilpitghlxiwiwtxgqadds.1. Perform an attack against the cipher based on a letter frequency count: How many letters do you have to identify th..
Calculate its nearest neighbor distance DMIN and farthest neighbor distance DMAX. Calculate ratio r = DMAX/DMIN. Repeat this 100 times for each d, and report he average r for each d in a table.
Should Iris have placed CD back at coffee station and forgotten entire thing? Describe why that action would have been ethical or unethical.
Illustrate how many protocols and protocol implementations are required to permit all nodes to communicate?
Application Architecture. You have been tasked with building a payroll program for a large organization with offices spread across the United States.
Suppose that an intruder could both insert and remove DNS messages into the network. Give three scenarios showing the problems that such an intruder could cause.
Discuss the differences between Wide Area Telecommunications Service and leased lines?
Given narrow (usable) audio bandwidth of telephone transmission facility, nominal SNR of 56dB (400,000). What can we say about actual maximum channel capacity?
The issues is pharmaceutical(drugs), explain how you would deal with one of the situations listed below which has brought you project to an abrupt stand still, the employer is supposing No responsibility, and wishes you to work it out.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd