A $\_-\_\_-$

$\_$takes as input a source that is effectively random and is often referred to as an entropy

source.

$$ A$.$ PRNG

$$ B$.$ PRF

$$ C$.$ TRNG

$$ D$.$ PSRN

The $\_\_\_\_\_\_\_\_\_$ algorithm performs various substitutions and transformations on the plaintext.

$$ A$.$ encryption

$$ B$.$ codebook

$$ C$.$ keystream

$$ D$.$ cipher

$-\_\_\_\_\_\_\_$protects against passive attack $($eavesdropping$).$

$$ A$.$ SCR

$$ B$.$ Encryption

$$ C$.$ Message authentication

$$ D$.$ Obfuscation

If the message includes a $\_\_\_\_\_\_-\_$ the receiver is assured that the message has not been delayed beyond that normally expected for network transit.

$$ A$.$ error detection code

$$ B$.$ timestamp

$$ C$.$ sequence number

$$ D$.$ shared key