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!
Cipher MethodsThere are 2 methods of encrypting plaintext:• Bit stream method – every bit in the plaintext bit is transformed into a cipher bit one bit at a time.• Block cipher method – the message is divided into blocks (for example sets of 8-, 16- or32-bit blocks) and then each block of plaintext is transformed into an encrypted block of cipher bits by using an algorithm and a key.Bit stream method which is uses algorithm functions like XOR, while block cipher method can use substitution, transposition, XOR, etc.Substitution cipherSubstitution cipher substitutes one value for the other value. The following are the different types of substitution:• Monoalphabetic substitution – It uses one alphabet to substitute. Simple method but powerful if combines with other operations.• Polyalphabetic substitution – It is more advanced method which uses two or more alphabets.• Vigenère cipher – It is an advanced type of cipher which uses simple polyalphabetic code that is made up of 26 distinct cipher alphabets.Transposition cipherTransposition cipher rearranges values within the block to create ciphertext.Exclusive OR (XOR)It is a function of Boolean algebra where the two bits are compared to each other• If the two bits are identical, result is 0• If the two bits not identical, result is 1Vernam cipherThis is developed at AT&T that uses set of characters once per encryption process.Book (or Running Key) cipherThis method uses text in book as key to decrypt a message where ciphertext contains codes which represents page, line and word numbersHash FunctionsHash functions are mathematical algorithms that generate message summary or digest to confirm message identity and confirm no content has changed. Hash algorithms are publicly known functions that create hash value. Use of keys is not needed, but message authentication code (MAC) may be attached to a message. This method is mostly used in password verification systems to confirm identity of user.
Write Pseudocode for the password guessing algorithm: Consider the following authentication protocol: Client Transmission Host
QUESTION An analog sensor is used to monitor the temperature of sea water at different depth. The sensor is fitted to a buoy and incorporates a wireless transmitter that send
QUESTION: (a) Ethernet has grown in popularity in the recent years and is now used in LANs. Give three reasons for the success behind Ethernet. (b) Ethernet uses the CSMA/CD
FRAME FORMAT AND ERROR DETECTION The changed frame format also adds CRC. If there is an error happened in frame, then it typically causes receiver to removed frame. The frame
You are hired as a consultant to help design a digital library in which books are scanned and stored digitally and made available to users of the World Wide Web. Assume that the li
QUESTION 1 Risk analysis helps companies prioritize their risks and shows management the amount of money that should be applied to protecting against those risks in a sensib
Q. Attacks on wireless network WSN are vulnerable to attacks which compromise the integrity of the WSN nodes by decreasing the nodes' fault tolerance capabilities, data distrib
Illustrate about TinySec Protocol TinySec is implemented on the link layer and addresses security requirements of the resource staffed nodes in the WSN based on the link layer
SHIFT OPERATION: This operation replaced all bits to the left one position. For example in the diagram below a 16-bit CRC hardware is given, which needs three Exclusive OR (
Secure Socket Layer (SSL) accepts a combination of asymmetric and symmetric (public-key) encryption to accomplish integrity, confidentiality, authentication and non-repudiation for
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd