C839v5/D334 EXAM QUESTIONS WITH VERIFIED SOLUTIONS LATEST UPDATE 2026

C839v5/D334 EXAM QUESTIONS WITH VERIFIED SOLUTIONS LATEST UPDATE 2026 128 - Answers The hash value in bits for MD5 is ____. A. 128 B. 160 C. 256 variable; fixed - Answers Hashing involves taking a _____ length input and producing a _____ length output (message digest). A. fixed; fixed B. variable; fixed C. fixed; variable 160 - Answers The hash value in bits for SHA-1 is ____. A. 128 B. 160 C. 256 128 - Answers The hash value in bits for MD4 is ____. A. 128 B. 160 C. 256 Transport - Answers IPSec ______ mode involves "end-to-end" encryption; i.e. data remains encrypted from the time it leaves a sender's device to the time it arrives at the receiver's device. A. Tunnel B. Transport C. Trusted Tunnel - Answers IPSec ______ mode involves encryption from gateway to gateway, i.e. just through the public network space. A. Tunnel B. Transport C. Trusted Tunnel Remember, with tunnel mode, encryption does not happen until just before it leaves the local network. Traffic likely remains unencrypted between the end user device and the local network boundary. - Answers A security analyst on a local network using monitoring tools is likely to only be able to read contents of traffic encrypted using IPSec ______ mode. A. Tunnel B. Transport C. Trusted Chaskey - Answers _____ is a lightweight cryptography method for signing messages (MAC). It boasts a relatively undemanding hardware implementation (only ~3,333 gates required at 1MHz clock rate) making it suitable for IoT implementation. 128 - Answers Chaskey has a key size of _____ bits. A. 256 B. 128 C. 80 salt - Answers A weakness of one-way hashing is that the same piece of plaintext will result in the same ciphertext unless _____ is applied. A. Salt B. Ash C. Ether 40 - Answers The minimum recommended key size to use with RC4 is _____ bits. A. 40 B. 20 C. 64 2048 - Answers RC4 is a symmetric stream cipher with a variable key size up to a max of _____ bits. A. 256 B. 2048 C. 1024 Data Encryption Standard (DES) - Answers _____ has a block size of 64 bits, key size of 56 bits, and 16 rounds of substitution & transposition. A. DES B. AES C. RC4 rainbow table - Answers A(n) _____ is a collection of precomputed hash values of actual plaintext passwords used for password cracking. A. initialization vector B. key pair C. rainbow table .cer - Answers _____ is a common x.509 certificate file type that is used with both PEM and DER formats. A. .crt B. .cer C. .der Triple Data Encryption Standard (3DES) - Answers _____ has a block size of 64 bits, key size of 112 bits, and 48 rounds of substitution & transposition. A. DES B. RSA C. 3DES 128, 192, 256 - Answers Key sizes used with the Advanced Encryption Standard (AES) include _____. _____, or _____. A. 10, 12, 14 B. 128, 192, 256 C. 32, 64, 80 128 - Answers The Advanced Encryption Standard (AES) operates using _____ bit blocks. A. 128 B. 192 C. 256 80 - Answers Skipjack is a symmetric block cipher that uses a ______ bit key. A. 64 B. 80 C. 112 128-bit key size; 64-bit IV - Answers Enocoro operates with a key size of ______ bits and an initialization vector (IV) of _____ bits. A. 80; 80 B. 128; 64 C. 80; 64 64 - Answers Skipjack has a block size of _____bits. A. 64 B. 80 C. 128 Light-weight hashing algorithms - Answers PHOTON, SPONGENT, Lesamnta-LW, and Quark are examples of light-weight _____. A. hashing algorithms B. public-key algorithms C. symmetric block ciphers IDEA - Answers _____ has a block size of 64 bits, key size of 128 bits, and 17 rounds of substitution & transposition. A. RSA B. DSA C. IDEA RSA - Answers _______ is a partially homomorphic crypto system that leverages prime number characteristics, operates with a bit variable key size, and 1 round. A. RSA B. Diffie-Hellman C. Chaskey Symmetric Block - Answers Blowfish and Twofish are both _____ ciphers with common key sizes of 128, 192, or 256 bits. A. symmetric block B. symmetric stream C. asymmetric RC5 - Answers _____ is a symmetric block cipher that uses block sizes of 32, 64, or 128 bits and boasts a variable key size up to 2048 bits. A. RC2 B. RC4 C. RC5 64 or 112 - Answers Quark produces a hash value of _____bits. A. 128 B. 64 or 112 C. 80 or 128 64 - Answers The block size used with XTEA is _____ bits. A. 56 B. 64 C. 80 128 - Answers The key size used with XTEA is _____ bits. A. 128 B. 256 C. 2048 Symmetric block cipher - Answers Camelia is a _____. A. Hash Algorithm B. Symmetric block cipher C. Symmetric key exchange algorithm Symmetric Block Cipher - Answers RC6 can best be described as a _____. A. Lightweight Hash Algorithm B. Symmetric Stream Cipher C. Symmetric Block Cipher 40 - Answers RC2 has a block size of 64 bits and variable key size up to 128 bits. What is the minimum recommended key size to use when employing RC2? A. 1 B. 40 C. 64 80; 80 - Answers The light-weight symmetric steam cipher Mickey v2 operates with a key size of ______ bits and an initialization vector (IV) variable up to _____ bits. A. 80; 80 B. 64; 128 C. 128; 64 Symmetric stream cipher - Answers RC4 is a(n) _____. A. Symmetric block cipher B. Symmetric stream cipher C. Asymmetric algorithm certificate signing request (CSR) - Answers An entity seeking to obtain a digital certificate must generate and submit a _____ request to a certificate authority to request the certificate. A. certificate binding B. certificate signing C. certificate initialization Symmetric stream cipher - Answers ChaCha is a(n) _____. A. Symmetric block cipher B. Symmetric stream cipher C. Asymmetric algorithm Asymmetric algorithms - Answers RSA and DSA are both_____. A. Hash algorithms B. Symmetric stream ciphers C. Asymmetric algorithms Diffie-Hellman - Answers _____ provides a method for key exchange using a one-way function. A. A hash algorithm B. Quark C. Diffie-Hellman Chaskey - Answers _____ is a Lightweight cryptography method for signing messages (MAC). A. Chaskey B. Diffie-Hellman C. Vigenere 40 - Answers WEP uses _____-bit RC4. A. 40 B. 128 C. 256 asymmetric key pair - Answers An entity seeking to obtain a digital certificate must first generate a _____ for themselves. A. secret key B. asymmetric key pair C. registration authority 128 - Answers WPA uses _____-bit RC4. A. 40 B. 128 C. 256 AES - Answers Wi-Fi Protected Access 2 (WPA2) uses 128-bit _____. A. RC4 B. AES C. ECC Mono-alphabetic - Answers _____ substitution is where a single mapping from our alphabet to a cipher alphabet is created. A. Mono-alphabetic B. Polyalphabetic C. Pseudo-random Sign the certificate with the CA's own private key - Answers What step will a certificate authority (CA) take after generating a digital certificate for a requester, but before issuing the certificate to that requester? A. Sign the certificate with the CA's own private key B. Sign the certificate with the CA's own public key C. Sign the certificate with the requester's private key Polyalphabetic - Answers _______ refers to the mapping of our alphabet to a number of cipher alphabets. A. Mono-alphabetic B. Polyalphabetic C. Pseudo-random One-time pad - Answers _____ is considered to be unbreakable since it only uses its cipher code once. ASCII - Answers _____ encoding involves 8-bit values and supports up to 256 characters. collision - Answers A _____ occurs when two different input values produce the same hash signature. A. collision B. rainbow C. tunnel UTF-16 - Answers _____ is an encoding method with 16-bit values and supports up to 65,536 characters. 80; 80 - Answers The light-weight symmetric stream cipher Trivium operates with a key size of ______ bits and an initialization vector (IV) of _____ bits. A. 80; 80 B. 64; 128 C. 128; 64 hardware security module (HSM) - Answers A _____ is a tamper-evident and intrusion-resistant physical device that safeguards and manages cryptographic keys and provides cryptographic processing. A. TPM B. HSM C. DES trusted platform module (TPM) - Answers A _____ is a dedicated processor that handles hardware-level encryption; allows the use of full disk encryption on a hard drive in a manner that minimizes the impact on system performance. A. TPM B. HSM C. PRNG HMAC - Answers _____ is a message authentication code (MAC) that can be used to verify the integrity and authentication of the message. It involves hashing the message with a secret key, and thus differs from standard hashing, which is purely a one-way function. A. HMAC B. Rainbow table C. Key escrow Symmetric - Answers _____ ciphers make use of a single secret key for both encryption and decryption. 01011 - Answers Solve by applying the binary XOR function. 1 1 0 1 1 1 0 0 0 0 A. 11011 B. 10000 C. 01011 10000 - Answers Solve by applying the binary AND function. 11011 10000 A. 11011 B. 10000 C. 01011 11011 - Answers Solve by applying the binary OR function. 11011 10000 A. 11011 B. 10000 C. 01011 1 - Answers 15 mod 7 = _____ A. 5 B. 2.14 C. 1 5 - Answers 12 mod 7 = _____ A. 5 B. 1.7 C. 1 Block, Stream - Answers The two types of symmetric ciphers are _____ and _____ A. Block, Stream B. CTR, DES C. Active, Passive Public key - Answers When encrypting data using asymmetric cryptography, which key should be shared or distributed to facilitate decryption? A. Secret key B. Private key C. Public key Block cipher modes - Answers _____ are used to manage how blocks of data are processed in symmetric encryption. A. Stream ciphers B. Block cipher modes C. Padding CFB, OFB, CTR - Answers Which symmetric block cipher modes enable the block cipher to operate like a stream cipher? A. ECB, DES, ECC B. CFB, OFB, CTR C. DSA, RSA, RC6 S-boxes - Answers Symmetric block ciphers make use of _____ to perform substitution as part the encryption process. A. p-boxes B. s-boxes C. IVs 64 - Answers PRESENT is a light-weight symmetric block cipher with a key size of 80 or 128 bits, 32 rounds, and ______ bit block size. A. 32 B. 64 C. 128 Asymmetric - Answers ______ cryptography makes use of a key pair (one public, one private) to perform encryption and decryption. If a given key in a key pair is used for encryption, only the opposite key in that key pair can perform the reverse decryption. A. Symmetric B. Asymmetric C. Hash Secret key - Answers When encrypting data using symmetric cryptography, which key may need to be exchanged to facilitate decryption? A. Secret key B. Private key C. Public key 2048 - Answers RC5 is a conventional symmetric block cipher that is suitable for light-weight implementations. It has a variable key size with a max of _____bits. A. 128 B. 256 C. 2048