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128
The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
variable; fixed
Hashing involves taking a _____ length input and producing a _____ length output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
160
The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
128
The hash value in bits for MD4 is ____.
A. 128
C839v5
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B. 160
C. 256
Transport
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
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.
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
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Chaskey
_____ 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
Chaskey has a key size of _____ bits.
A. 256
B. 128
C. 80
salt
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
The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
2048
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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)
_____ 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
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
_____ 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)
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128
The hash value in bits for MD5 is ____.
A. 128
B. 160
C. 256
variable; fixed
Hashing involves taking a _____ length input and producing a _____ length output (message digest).
A. fixed; fixed
B. variable; fixed
C. fixed; variable
160
The hash value in bits for SHA-1 is ____.
A. 128
B. 160
C. 256
128
The hash value in bits for MD4 is ____.
A. 128
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B. 160
C. 256
Transport
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
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.
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
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Chaskey
_____ 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
Chaskey has a key size of _____ bits.
A. 256
B. 128
C. 80
salt
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
The minimum recommended key size to use with RC4 is _____ bits.
A. 40
B. 20
C. 64
2048
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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)
_____ 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
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
_____ 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)
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