Cybersecurity Coursework Example | Topics and Well Written Essays - 1000 words

Cybersecurity - Coursework ExampleThe N-gram list of Caesar encoding of the document itself would be the just about effective for a cryptanalyst to use to de scratch a text encrypted with the Caesar cipher as it acquaints the frequency of each character used in the document. As E is the most commonly used letter of the alphabet, seeing that the highest frequency letter is H with 148 different instances of the letter would signalize that H is the substitute for the letter E. With this known, it can be seen that there is a shift of 3 defer in this particular cipher. Once that has been determined, it would be a simple enough task to pair up all the other letters with their associated substitutions, and then translate the document back to its original text. Q2. What do you vizor about the histogram results when text is encrypted with the Vigenere cipher in comparison to the results of the Caesar cipher? Why is this the case? The histogram results of the Vigenere cipher show an incr ease in the frequency of the letters that were used in the code word applesauce that encrypted the document. The Caesar cipher does not show this kind of across the board increase in particular letters out-of-pocket to the fact that it does not work forth of an encryption key of this nature, but works instead off of an alphabet shift. Q3. There is an error in the following cipher text representation of this quote what is it? What should the repair cipher text be? SDAHFOWGRABSSRERIVBYBSCIMQTFNIVETGHBSNQCNCSDTDHBSNQCD ECNICIFCTIC The error in the following cypher text occurs in the one-quarter to last letter of the text. The second to last C that is listed in the above cipher text should be an O instead. The cipher text for the quote, The difference between stupidity and genius is that genius has its limits should read SD AH FO WG RA BS SR ER IV BY BS CI MQ TF NI VE TG HB SN QC NC SD TD HB SN QC DE CN IC IF OT IC. Q4. Of the 3 ciphers discussed (Caesar, Vigenere, Playfair), what are their relative degrees of security and why? Of the three ciphers discussed, the Caesar is the easiest cipher to break. This particular cipher may be found and used by anyone of any board I can remember using it back in elementary school in coiffe to pass notes in class. The Vigenere cipher is a bit stronger, requiring a more complex method of abridgment in order to determine the proper code needed in order to unlock the cabalistic message. It is the Playfair cipher, however, which shows itself to be the most secure of the three ciphers, as it removes all spacing, or generates its own spacing subsequently every second character, making it impossible to guess the word without the need to crack the code first. science laboratory 2 Advanced Cryptography Functions Q5. For each of the following, state whether ECB or CBC would be most permit and give a brief explanation as to why. a. An online bank statement b. An encrypted VoIP session