How we can protect the data in transit in a variety of applications such as data transfer on the Internet, and on cellular phone networks.
a) Encryption
b) Data mining
c) Internet Security
d) Decryption
Answer:a
2. Which key is used to access the encrypted message?
a) Encryption key
b) Decryption key
c) Primary key
d) Foreign key
Answer:b
3. Which of the following is a property of good encryption technique?
a) Relatively simple for authorized users to encrypt and decrypt data
b) Decryption key is extremely difficult for an intruder to determine
c) Encryption depends on a parameter of the algorithm called the encryption key
d) None of the mentioned
Answer:b
4. Which key is used to encrypt and decrypt the data ?
a) Public key
b) Private
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Which method does not involve password travel across the internet ?
a) E commerce
b) Manipulation system
c) Challenge–response system
d) Responce system
Answer:c
8. In Assymmetric Encryption, a message encrypted with the Public Key only be decrypted with the receiver’s appropriate Private Key. Justify?
a) Not true, the message can also be decrypted with the Public Key
b) A so called “one way function with back door” is applied for the encryption
c) The Public Key contains a special function which is used to encrypt the message and which can only be reversed by the appropriate Private Key
d) The encrypted message contains the function for decryption which identifies the Private Key
Answer:b
9. What is the main drawback of the symmetric Encryption?
a) More complex and therefore more time-consuming calculations
b) Problem of the secure transmission of the Secret Key
c) Less secure encryption function
d) Isn’t used any more
Answer:b
10. What is the purpose a key during encrypt a message?
a) The key indicates which function is used for encryption. Thereby it is more difficult to decrypt a intercepted message as the function is
3.3. Frontier molecular orbital The electronic structure of the doped fullerene interacting with glycine compared to pure fullerene C20 has been calculated with density functional theory using the B3LYP/6-31G basis set. The molecular orbital theory, the relative chemical reactivity of a molecular system can be estimated using HOMO and LUMO energies and overlaps of molecular orbital [18-20]. The electronic transition from the HOMO to LUMO are mainly derived from the electron density transfer n orbital to p* orbital.
The coordinates of the system is defined by , θ = angle of the chassis from vertical, α = angle of tread assemblies from vertical, Ø = rotation angle of tread sprockets from vertical, mc = mass of chassis, mT = mass of tread, ms = mass of sprocket, Lc = length from centre of sprocket to centre of chassis, LT = length from centre of sprocket to centre of tread assembly. The kinetic energies of the sprocket, chassis and tread assemblies are given respectively , T_S=1/2[m_c x ̇^2+J_S φ ̇^2] (1) T_C=1/2 [〖m_c (x ̇-L_c θ ̇ cosθ)〗^2+m_c (〖L_c θ ̇ sin〖θ)〗〗^2+J_c θ ̇^2 ] (2) T_T=1/2[m_T (〖x ̇-L_T α ̇ cos〖α)〗〗^2+m_T (〖L_T α ̇ sin〖α)〗〗^2+J_T α ̇^2] (3) The gravitational potential energy is given by ,
1. What type of circuit is this? Half-wave rectifier 2. Sketch the circuit (MULTI-SIM). 3.
Hash is applied to the message and encrypted using the sender’s public key now the encrypted hashed encrypted message and the message is
So in our Hybrid model - Strong, efficient and reliable personal messaging peer to peer architecture based on Hybrid RSA for an active networked environment, to tackle the Chosen cipher text attack when messaging is going on, Public Key Cryptography Standards (PKCS) version 5 is used. The basic RSA with Rabin-Miller strong Primality test with Efficient RSA with Euler Phi function variants integration and pohligHellmanEncipher with salt and padding integration makes it stronger and more reliable from the attacks like factorization of the RSA modulus n, message iteration attack, broadcast decryption by small exponent attack, broadcast decryption by common modulus attack, fault injection attack, the small difference between p and q attack and the finding eth root attack, Mathematical attacks and Timing attacks. Brute force attach is tackle by randomly changing the keys in synchronous time gap with 1024-bit value [13]. Also if somebody monitors pattern of the key so here as second layer and third layer reliable authentication between two parties key exchanging are there from the beginning. As in the instant messaging we generally cannot message for so long, so within these short time it’s quite impossible to do any brute force in our architecture with
1. Give an example in which the operating system would use a bitmap to manage resource. Answer: Windows, Android like operating systems uses bitmap to manage resources. 2.
Unit 1 Activity 3: Throughout this course, I have been able to develop a wide variety of many different skills, from when I first attended St Louis I had a reasonable understanding of my reading and speaking skills, after reviewing the listening and speaking content and completing the assignments it has helped me improve so much not only in school but in my everyday life since the first day I attended St. Louis improving my skills and helping me to Avoid distractions, listening for the main idea and supporting details, Asking questions, and Visualizing. An example from the course is the Rick Mercer report on the issue of young voters that was shown in class, it was extremely effective in helping me correct my the previous listening skill errors I had made in past assignments, from encouraging the
In this cipher we make a key before encrypting the message so that it is a bit more secure. In this method the key shifts the alphabets according to its position. In this encryption the key needs to be known for the person decrypting it because there are about 26n possibilities where n is the number of letters in the string.
In In band exchange makes use of the same communication medium to exchange the symmetric key and the encrypted data. This type of exchange subject to eaves dropping or man in the middle attacks. In Out-of-band key exchange, the key exchange will rely on having been shared in advance.
In the present era everyone needs fast processing and less space required to store results in computation process as well as security of information. There are many encryption algorithms in which some of these take more computation time, some of these take less, but all has their own advantages and disadvantages. Mainly encryption are classified into two based on key used are: asymmetric key encryption and symmetric key encryption. Asymmetric key Encryption is also called public key cryptography. In this, two different keys are used, one is for encryption called public key and decryption is performed by another key termed as a private key.
Nowadays, data encryption has become more recognized and people use it publicly. Diffie-Hellman Key-Exchange idea is that individual can exchange keys openly while ensure privacy (Mollin, 2007). Such as, one for encryption that opens for public and one for decryption to keep private.
Public key cryptography is an asymmetric method that use a pair of keys for encryption: a public key which is used to encrypt data, and private, or secret key is used to decryption. It requires that a person must have a pair of public key and private key. The public key is distributed in the open so that anyone wishing to communicate with that in a secure way than he can use the receiver’s public key to convert the plaintext into cipher text. This cipher text cannot be converted into same plaintext using same public key. Therefore, there is no issue if some other person knows about public key.
Solid cryptography " There are two sorts of cryptography
Data integrity refers to the accuracy, consistency (validity) of data over its lifecycle. Compromised data is of little use to enterprises, not to mention the dangers presented by sensitive data loss. Consequently, data integrity is one of the most critical elements in any system Subashini & Kavitha, 2010) and it is a core focus of many enterprise security solutions. Data integrity defines the quality of information, which guarantees the data exist, is accurate, complete, and has a whole structure. Data integrity is preserved only if and when the data is satisfying all the business requirements and important rules and regulations.
Using an algorithm and the key, the encryption application turns your plain text into “cipher text”. After send the cipher text message to the recipient. The recipient runs the cipher text through the same application which uses the algorithm and the key to decrypt and read