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.
In Star topology all computers are connected using a central device known as hub. Star networks are one of the most general computer network topologies. In its simplest way, a
ADDRESS MASKS To identify receiver, network apply address mask to receiver address and calculate to network address in routing table. It can use Boolean 'and' to calculate the
LOCALITY OF REFERENCE PRINCIPLE: Principle of "Locality of Reference" use to predict computer interaction patterns. There are two patterns shown as follows: a) Spatial loca
What are the main differences between TCP/IP vs OSI?
The best results obtained in the PIIT classes have been when the technique has been used in tutorial groups, rather than have students submit individual reflections on particular c
Network security is an issue for companies regardless of whether they participate in electronic commerce; however, since most organizations have a Web site that allows some interac
An overall rise in mobility, coupled with the falling cost of Wi-Fi equipment, has led to a proliferation of Wi-Fi hot spots in public areas to provide Internet accessibility. Thus
why is it that sometime we put password in our account to login or signup and it would not work?
homlox prv hetorx orxolxpersorx
Security Clearances For a security clearance in organizations each data user should be assigned a single level of authorization indicating classification level. Before approachi
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