Encryption Essay Example | Topics and Well Written Essays - 1500 words

Encryption - Essay Example Chung takes V2 kL mod n1 received from Lilly and operates on it by exponentiation modulo n1 with kC to give V2 kLkC mod n1. He intends to use this as session key ks1C to encrypt his message to a client. Ks1C = V2 kLkC mod n1 = 37(127*234) mod 257 = 133 mod 257 Step 4 Lilly takes V1 kC mod n1 received from Chung and operates on it by exponentiation modulo n1 with kL to give V1 kCkL mod n1. She intends to use this as session key ks1L to attempt to decrypt Chung's message to a client. Ks1L = V1 kCkL mod n1 = 126(234*127) mod 257 = 252 mod 257 (b) If Chung and Lilly had both picked the value V4 for their parts of the key exchange using the method illustrated in part (a), the result would be a session key of 192. Complete Table A4 to show how a session key ks = 192 might be encrypted with the client's public key, and then decrypted by the client on receipt. Table A4 Encryption of the session key Step 1 The value for the session key ks supplied in Question 2 Part (b). ks =192 Step 2 The value for the modulus n2 supplied in Question 2 Part (b) n2 =26 Step 3 The value of the session key ks written as text ks expressed in text = one nine two Step 4 A suitable value for Tait's public key KT KT = 15 Step 5 The session key ks encrypted with Tait's public key KT. { ks} KT = C T: {R}ks, {ks}KT = CNINQNIZSC Step 6 __ A suitable value for Tait's private key KT __ KT =7 Step 7 The result of decrypting the encrypted session key __ using Tait's private key KT {{ks}KT}KT = ONENINETWO Question 3 Complete the following unfinished sections in the main body and appendix of the report printed in the appendix to this companion, and referred to in the 'Background for Questions...Today, the encryption process involves altering and rearranging bits of digital data using a systematic procedure that can be converted into a computer program. Encryption is a commonly used method for providing a certain degree of security in technology-based systems. Simple encryption methods include the substitution of letters for numbers, the rotation of letters in the alphabet or the "scrambling" of voice signals by inverting the sideband frequencies. The more complex methods use sophisticated computer algorithms that rearrange the data bits in digital signals. Data is converted into a series of numbers which are then used as input into calculations. The calculated results become the encrypted data (Case Resource). In 1976 the idea of public key encryption was introduced to the field of cryptography. The idea revolved around the premise of making the encryption and decryption keys different so that the sender and recipient need not know the same keys. The sender and the recipient will both have their own private key and a public key would be known by anyone. Each encryption or decryption process would require at least one public key and one private key (Mycrypto.net 2008). Public key encryption techniques or asymmetric key systems avoid the need to distribute keys in secret. Symmetric key systems are those which allow the decryption process to be derived from the encryption key.

Psychological knowledge or research Essay Example | Topics and Well Written Essays - 1000 words

Psychological knowledge or research - Essay Example Political psychology is relevant to this article as it is an interdisciplinary subject which touched on areas of cognition, communication, emotion and the human mind. This particular filed of study is certainly at work in most or all of the news reports and media that we view. The author of this particular article really does not employ a heavy power of persuasion or even emotion thereby slightly losing her readers’ attention or emotional response. Deeper and more thorough analysis of this article may in fact yield a psychological media tactic actin within this article. In a different and unrelated article from the Chicago Tribune, Bonnie Miller and Ashley Wiehle note the case of a particular woman who suffered for years with an eating disorder. Her picture is present with the article as is the fact that her recovery cost her family $100,000. The fact that the authors placed a picture of the now healthy Traub in order for their readers to view her as a real person. When we are able to rest our eyes on the tangibility of human suffering, we are that much more likely to actively empathize with that individual as an entity and not just a disembodied name or case study. Certainly, the article raises interesting points that spark the interest of the reader. This includes the amount of money spent on treatment for an eating disorder as well as how blatantly necessary treatment is to those suffering with an eating disorder. The authors also provide quantitative data such as Traub’s morbidly low weight of less than 100 lbs and the startling amount o f money required for treatment. This truly allows the reader to ponder things such as what Traub must have looked like prior to treatment. The reader can also better appreciate the expense of treating an eating disorder when insurance has in the past, never covered treatment for Anorexia and Bulimia. The authors list