Which of the following is the standard that likely to dominate encryption in the near future? Group of answer choices RC4 DES 3DES AES
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Encryption standards are algorithms used to secure data by converting it into a format that cannot be easily understood without a key. Show more…
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Which of the following answers are correct about data encryptions? 1. The cipher block chaining mode is a common method of applying data encryption to a long text message to take care of repeating patterns in the message. 2. 2DES/2 meets the security requirements for encrypting important messages. 3. AES is an implementation of Feistel's cipher scheme. 4. DES allows three different key lengths, namely, 128 bits, 192 bits, and 256 bits. 5. AES operations are finite-field operations on bytes, where each byte represents a polynomial of degree 7, to allow multiplication and inverse operations on bytes.
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Question: Ideally, a valid encryption scheme should have the following properties: A. Source: If intercepted, hard to decode B. Easy to encrypt C. Hard to transmit D. Easy for recipient to decode E. Source of the message should be impossible to validate Question: Select all TRUE about digital signatures: A. It depends on the message B. It depends on the user's usual (ink) signature C. Should be verified with private key D. Signed with private key E. Digital signature depends on a random number that is different each time Question: Select all TRUE of both RSA and ECDSA. A. They are digital signature algorithms B. They use public and private keys C. They protect against authentication/verification of messages D. They are of equal strength E. The public key is used to sign
Which of the following best describes the decryption in Triple DES? (A) Plain text $=D_{K_{1}}\left(E_{K_{2}}\left(D_{k_{1}}\right.\right.$ (ciper text))) (B) Plain text $=D_{K_{1}}\left(E_{K_{2}}\left(D_{k_{3}}\right.\right.$ (ciper text))) (C) Plain text $=E_{K_{1}}\left(D_{K_{2}}\left(E_{k_{1}}\right.\right.$ (ciper text))) (D) Plain text $=E_{K_{1}}\left(D_{K_{2}}\left(E_{k_{1}}\right.\right.$ (ciper text)))
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