2. a) Decrypt DAGFXGXDDAVVVGGVGDGDXX given the key IMAGE

Decrypt DAGFXGXDDAVVVGGVGDGDXX given the key IMAGE

Write down decryption in CBC mode, and give a detailed explanation why it works

Which of the following keys is used by the recipient to decrypt a message encrypted using asymmetric encryption algorithm?Group of answer choicesReceiver’s public keySender’s private keySender’s public keyReceiver’s private key

1.Question 1Plaintext is the original message, whereas _____ is the encrypted message.1 pointciphertextcipherdigestalgorithm2.Question 2How can you make a symmetric encryption key more difficult to break?1 pointIncrease the length of the key.Use an initialization vector with the key.Use the key fewer than five times.Make the key smaller.3.Question 3Which of the following are necessary components for encryption and decryption operations when using an asymmetric encryption system? Select all that apply.1 pointPrivate keyDigestpublic key signaturePublic key4.Question 4A company wants to create a communication scheme that is both secure and efficient, using the benefits of both symmetric and asymmetric encryption. How would they do this?1 pointThe company can use a message authentication check (MAC) to keep their information secure. It isn’t possible to use symmetric and asymmetric encryption at the same time.The company could use a symmetric encryption key that they transmit to other parties via asymmetric encryption. The company could use an asymmetric encryption key that they transmit to other parties via symmetric encryption. 5.Question 5Which of the following options are true of an ideal hash function? Select all that apply.1 pointThe same input always results in the same output.Different inputs never result in the same output.It maps any amount of data to an output of fixed size.It is possible to recover the original plaintext from the hash output.6.Question 6Which of the following strategies can make passwords and password hashes stronger and more difficult for hackers to use?1 pointUsing randomly chosen and large password salts.Using an uncommon password.Running passwords through the hashing function multiple times. Use passwords that are known to be strong. 7.Question 7The HTTPS protocol keeps internet traffic secure by encapsulating HTTP traffic over an encrypted channel that uses ____.1 pointSSHSSLPGP protocolsTLS8.Question 8____ is a system that defines the creation, storage, and distribution of digital certificates. 1 pointVPNCAPKITLS9.Question 9Complete the Qwiklab Creating/inspecting key pair, encrypting/decrypting and sign/verify using OpenSSL before answering this question. You’re a consultant and you want your clients to be able to send you important documents in a secure manner. You decide to use RSA key pairs to accomplish this. What should you share with your clients?1 pointyour PKIyour private keyyour public keyyour digital certificate10.Question 10Complete the Qwiklab Creating/inspecting key pair, encrypting/decrypting and sign/verify using OpenSSL before answering this question. You share text files with colleagues using RSA key pairs. Your colleague suggests creating hash digests of text files you share. What will this accomplish?1 pointIt will create an extra public key.It will allow you to verify if the text files have been modified. It will create an extra private key.It will encrypt the public key file.

Which two statements about encryption are correct? (Choose two.)