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Download Certified Encryption Specialist Exam Dumps
NEW QUESTION 47
With Electronic codebook (ECB) what happens:
Answer: A
Explanation:
The message is divided into blocks and each block is encrypted separately. This is the most basic mode for symmetric encryption
https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Electronic_codebook_(ECB) The simplest of the encryption modes is the electronic codebook (ECB) mode (named after conventional physical codebooks). The message is divided into blocks, and each block is encrypted separately.
NEW QUESTION 48
Juanita is attempting to hide some text into a jpeg file. Hiding messages inside another medium is referred to as which one of the following?
Answer: A
Explanation:
Steganography
https://en.wikipedia.org/wiki/Steganography
Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video. The word steganography comes from Greek steganographia, which combines the words steganos, meaning "covered or concealed", and -graphia meaning "writing".
Incorrect answers:
Cryptography, or cryptology, is the practice and study of techniques for secure communication in the presence of third parties called adversaries.
Steganalysis - is the study of detecting messages hidden using steganography; this is analogous to cryptanalysis applied to cryptography.
NEW QUESTION 49
Which of the following statements is most true regarding binary operations and encryption?
Answer: A
Explanation:
They can form a part of viable encryption methods
for example - https://en.wikipedia.org/wiki/XOR_cipher
The XOR operator is extremely common as a component in more complex ciphers. By itself, using a constant repeating key, a simple XOR cipher can trivially be broken using frequency analysis. If the content of any message can be guessed or otherwise known then the key can be revealed. Its primary merit is that it is simple to implement, and that the XOR operation is computationally inexpensive. A simple repeating XOR (i.e. using the same key for xor operation on the whole data) cipher is therefore sometimes used for hiding information in cases where no particular security is required. The XOR cipher is often used in computer malware to make reverse engineering more difficult.
NEW QUESTION 50
_____ uses at least two different shifts, changing the shift with different letters in the plain text.
Answer: B
Explanation:
multi-alphabet encryption
https://en.wikipedia.org/wiki/Polyalphabetic_cipher
Two different shifts create two different alphabets.
For +1 and +2
Plaintext alphabet
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
2 ciphertext alphabets
B C D E F G H I J K L M N O P Q R S T U V W X Y Z A
C D E F G H I J K L M N O P Q R S T U V W X Y Z A B
Incorrect answers:
Scytale - transposition cipher
Caesar cipher - monoalphabetic cipher
Atbash - monoalphabetic cipher
NEW QUESTION 51
Which one of the following wireless standards uses the Advanced Encryption Standard (AES) using the Counter Mode-Cipher Block Chaining (CBC)-Message Authentication Code (MAC) Protocol (CCMP)?
Answer: D
Explanation:
WPA2
https://en.wikipedia.org/wiki/Wi-Fi_Protected_Access#WPA2
WPA2 use the Counter Mode-Cipher Block Chaining (CBC)-Message Authentication Code (MAC) Protocol (CCMP).
NEW QUESTION 52
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