CSI 104 - Part 2

______________means concealing the message by covering it with something else.

• Cryptography

• Steganography

• Compressing

• Authentication

In __________cryptography, the same key is used by the sender and the receiver.

• symmetric-key

• asymmetric-key

• public-key

• open-key

In _________ cryptography, the same key is used in both directions

• asymmetric-key

• symmetric-key

• public-key

• open-key

_________ cryptography is often used for long messages.

• Symmetric-key

• Asymmetric-key

• Public-key

• Open-key

___________ cryptography is often used for short messages.

• Symmetric-key

• Asymmetric-key

• Secret-key

• Open-key

__________means that the sender and the receiver expect confidentiality.

• Nonrepudiation

• Integrity

• Authentication

• encryption and decryption

_______ file can be accessed randomly.

• A sequential

• An indexed

• A hashed

• Any

When a sequential file is updated, the ______ file gets the actual update.

• new master

• old master

• transaction

• error report

When a sequential file is updated, the ______ file contains the changes to be applied.

• new master

• old master

• transaction

• error report

If the transaction file key is 20 and the first master file key is 25, then we _______.

• add the new record to the new master file

• revise the contents of the old master file

• delete the data

• write the old master file record to the new master file