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165 practice exam questions related to cryptography. The questions cover topics such as hashing, symmetric and asymmetric cryptography, block cipher modes, and light-weight ciphers. The questions are multiple-choice and provide answers with explanations. suitable for students studying cryptography or preparing for certification exams in the field.
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The hash value in bits for MD5 is ____. A. 128 B. 160 C. 256 12 Hashing involves taking a _____ length input and producing a _____ length output (message digest). A. fixed; fixed B. variable; fixed
C. fixed; variable variable; fixed The hash value in bits for SHA-1 is ____. A. 128 B. 160 C. 256 160 The hash value in bits for MD4 is ____. A. 128 B. 160 C. 256 128 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.
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. _____ 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. Chaskey Chaskey has a key size of _____ bits. A. 256
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 salt The minimum recommended key size to use with RC4 is _____ bits. A. 40 B. 20
Data Encryption Standard (DES) 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 rainbow table _____ is a common x.509 certificate file type that is used with both PEM and DER formats. A. .crt B. .cer C. .der
.cer _____ has a block size of 64 bits, key size of 112 bits, and 48 rounds of substitution & transposition. A. DES B. RSA C. 3DES Triple Data Encryption Standard (3DES) Key sizes used with the Advanced Encryption Standard (AES) include _____. _____, or _____. A. 10, 12, 14 B. 128, 192, 256 C. 32, 64, 80 128, 192, 256
Enocoro operates with a key size of ______ bits and an initialization vector (IV) of _____ bits. A. 80; 80 B. 128; 64 C. 80; 64 128-bit key size; 64-bit IV Skipjack has a block size of _____bits. A. 64 B. 80 C. 128 64 PHOTON, SPONGENT, Lesamnta-LW, and Quark are examples of light-weight _____.
A. hashing algorithms B. public-key algorithms C. symmetric block ciphers Light-weight hashing algorithms _____ has a block size of 64 bits, key size of 128 bits, and >17 rounds of substitution & transposition. A. RSA B. DSA C. IDEA IDEA _______ is a partially homomorphic crypto system that leverages prime number characteristics, operates with a 1024-4096 bit variable key size, and 1 round.
The key size used with XTEA is _____ bits. A. 128 B. 256 C. 2048 128 Camelia is a _____. A. Hash Algorithm B. Symmetric block cipher C. Symmetric key exchange algorithm Symmetric block cipher
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 80; 80 RC4 is a(n) _____. A. Symmetric block cipher B. Symmetric stream cipher C. Asymmetric algorithm Symmetric stream cipher 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 certificate signing request (CSR) ChaCha is a(n) _____. A. Symmetric block cipher B. Symmetric stream cipher C. Asymmetric algorithm Symmetric stream cipher RSA and DSA are both_____. A. Hash algorithms
Chaskey WEP uses _____-bit RC4. A. 40 B. 128 C. 256 40 An entity seeking to obtain a digital certificate must first generate a _____ for themselves. A. secret key B. asymmetric key pair C. registration authority asymmetric key pair
WPA uses _____-bit RC4. A. 40 B. 128 C. 256 128 Wi-Fi Protected Access 2 (WPA2) uses 128-bit _____. A. RC B. AES C. ECC AES
