Computer Security And Information Assurance

The book states that there are three rules that coding methods should adhere to. When it comes to coding and decoding, a coding method needs to be followed by everyone properly. Users must be able to store, send, and retrieve code using the coding method. The coding method must be able to follow the goals of computer data representation which are compactness and range, accuracy, ease of manipulation, and standardization.

Setting up a new computer can be a very intimidating task. There are several steps to ensure that your computer has the necessary setup for the best protection. Some of which include, the operating system settings that are built-into the computer, properly setup of firewall, security settings on the web browser configured correctly, and strong anti-virus software installed to protect the computer. After the computer is setup with a reasonable standard of security, a strong policy for passwords should be implemented to ensure account security along with ensuring the sites you utilize are in fact secure and who they say they are.

The following table shows how the instructions that this processor uses can be interpreted in the RTL:

First of all we have to find out what number stands for which letter in the alphabet. For this example we are going to be using A=01 and B=001 so for example C would have to equal 0001 and D would be 00001 and so on. Since we now have our rules for what numbers mean which letters we can move on to writing secret messages. With our given code we can now decipher any code, so then what would 0010100001 mean? It is easier to break down the code first. since all of our numbers end in 1 we can start there and example of this would be the following: 001,01,00001. Now that we have our code separated the final step is to look for what the numbers stand for in this case 01=A, 001=B and 00001=D so this must mean that BAD is our secret

The next technique is the error correcting code, which take redundancy into account. It can detect errors and then correct them. By using the triple repetition code, which repeats a message three times, we can decipher a string using the simple majority rule which will compare the bits in the original bit strings and use it to decide if an

You match each letter by a number from 0 to 25, with A being 0, B being 1, C being 2 etc and you encode each letter by shifting the alphabet forward two places, which is the same as adding 2 to your starting

Louis got hold of some of this code and tried it out. It was much better than reading the gigantic books with gigantic raised letters.

Encoding is used to generate a coded output (such as BCD or binary) from a singular active numeric input line.

Recent breaches of Personal Identifiable Information (PII) highlight the failure of technical mitigation to prevent external threats. Whenever you send personal information across the internet, be it passwords, credit card information or personal contact details, encryption stops others from seeing what you are doing. Data is jumbled up in a manner so that when it travels through the internet it is completely unreadable, this stops hackers who may intercept the data from seeing what you’re doing. Cryptography is the process which meres words with letter, numbers and images to be viewed by the public, while not revealing the meaning of the message. Once a message has been encrypted it is secure to transmit or to remain at rest. The

Schou, C., Hernandez, S. (2014). Information Assurance Handbook: Effective Computer Security and Risk Management Strategies. McGraw-Hill, ISBN:9780071821650

Permutation (P): the resulting 32 bits are reordered according to a fixed permutation before being sent as the output.

By using SCAN decoder algorithm7 the transition from the hard-output SC decoder to the soft-output SCAN decoder is performed. The SCAN decoder in this form requires as many memory elements as the BP decoder does. To reduce this huge storage requirement we are using another algorithm that is memory-efficient8 SCAN decoder. From Fig 2: In this example9, memory elements required to store B with corresponding φ displayed next to a particular Bλ(φ). In any iteration, the SCAN decoder does not need {Bλ(φ) : φ is even} for the next iteration, and we can overwrite particular Bλ(0) (shown with green rectangles) at any depth λ with { Bλ(φ): φ is even, φ≠0} (shown with yellow rectangles). On the other hand, the SCAN decoder requires {Bλ(φ) : φ is odd} (shown with white rectangles) for processing in the next iteration. The SCAN decoder reuses B2(0) and B3(0) (shown with green rectangles) by overwriting them with the values of B2(2),B3(2), B3(4),B3(6) and does not need extra memory for them. From this we save five memory

Encrypt(pk, i, m): executed by any individual who needs to scramble information. On data an open key pk, a file i meaning the cipher text class, and a message m, it yields a cipher text C.

Ans: Unicode is used for internal representation of characters and strings and it uses 16 bits to represent each other.

The same character is replaced by different alpha numerical values which gives more security to the message.