# Which term is used to describe the process that converts data into an unreadable form of text

## Which term is used to describe a password protected encrypted data file that verifies the identity of the sender of a message?

Lesson 7 CIW Internet Security

A | B |
---|---|

digital certificate |
a password-protected, encrypted data file that verifies the identity of a sender of a message |

digital signature | electronic stamp that identifies a message’s source and its contents |

non-repudiation | ability to prove a transaction occurred |

## What term best describes a file of programming code that provides a temporary fix to a known bug?

Which term best describes a file of programming code that provides a temporary fix to a known bug?

**Patch**. You just studied 20 terms!## Which encryption method provides data integrity?

**Asymmetric encryption, or public key cryptography**, is the core technology that enables PKI and offers data protection in various communication channels. On the other hand, private key encryption, also known as symmetric encryption, is a technique that uses one key for both encryption and decryption.

## What best describes symmetric key encryption?

Which statement best describes asymmetric-key encryption? … Which statement best describes symmetric-key encryption?

**An encryption method in which the same key is used to encrypt and decrypt a message**.**Your computer crashed, and you lost many personal and work-related files**.## What term is used to describe a training session that is delivered over the Internet?

Which term is used to describe a training session that is delivered over the Internet?

**Webinar**.## Which term is used to describe a software application that is secretly placed on a user’s system to gather information and relay IT to outside parties?

**Spyware (or adware)**is a software application that is secretly placed on a user’s system to gather information and relay it to outside parties, usually for advertising purposes.

## Where is symmetric encryption used?

Some of the most common use cases for symmetric cryptography include:

**Banking: Encrypting credit card information or other personally identifiable information (PII) required for transactions**.**Data storage**: Encrypting data stored on a device when that data is not being transferred.## What are the problems with symmetric key encryption?

While symmetric encryption offers a wide range of benefits, there is one major disadvantage associated with it: the

**inherent problem of transmitting the keys used to encrypt and decrypt data**. When these keys are shared over an unsecured connection, they are vulnerable to being intercepted by malicious third parties.## What is symmetric and asymmetric encryption?

**Symmetric encryption uses a single key that needs to be shared**among the people who need to receive the message while asymmetric encryption uses a pair of public key and a private key to encrypt and decrypt messages when communicating.

## What is DES algorithm in cryptography?

The DES (Data Encryption Standard) algorithm is

**a symmetric-key block cipher created in the**early 1970s by an IBM team and adopted by the National Institute of Standards and Technology (NIST). The algorithm takes the plain text in 64-bit blocks and converts them into ciphertext using 48-bit keys.## What is aes128 encryption?

128-bit AES encryption refers to

**the process of concealing plaintext data using an AES key length of 128 bits**. 128-bit AES encryption uses 10 transformation rounds to convert plaintext into ciphertext and is approved by the National Security Agency (NSA) to protect secret but not top-secret government information.## What is symmetric system?

Symmetric cryptography, known also as secret key cryptography, is

**the use of a single shared secret to share encrypted data between parties**. … In simple terms, the sender encrypts data using a password, and the recipient must know that password to access the data. Symmetric encryption is a two-way process.## What is expansion table in DES?

The expansion function is interpreted as

**for the initial and final permutations**. Note that some bits from the input are duplicated at the output; e.g. the fifth bit of the input is duplicated in both the sixth and eighth bit of the output. Thus, the 32-bit half-block is expanded to 48 bits.## Which type of algorithm DES is?

Data Encryption Standard (DES) is

**a block cipher algorithm**that takes plain text in blocks of 64 bits and converts them to ciphertext using keys of 48 bits. It is a symmetric key algorithm, which means that the same key is used for encrypting and decrypting data.## What is DES Mcq?

This set of Cryptography Multiple Choice Questions & Answers (MCQs) focuses on “The

**Data Encryption Standard**(DES) and It’s Strength”. … In the DES algorithm, although the key size is 64 bits only 48bits are used for the encryption procedure, the rest are parity bits.## What is permutation in DES algorithm?

Bits are permuted as well hence called

**expansion permutation**. This happens as the 32-bit RPT is divided into 8 blocks, with each block consisting of 4 bits. Then, each 4-bit block of the previous step is then expanded to a corresponding 6-bit block, i.e., per 4-bit block, 2 more bits are added.## What is permutation and substitution in DES?

To accomplish encryption, most secret key algorithms use two main techniques known as substitution and permutation. Substitution is

**simply a mapping of one value to another**whereas permutation is a reordering of the bit positions for each of the inputs.## What is substitution DES?

The substitutions are performed by

**eight substi- tution boxes, or S-boxes**. Each S-box has a 6-bit input and a 4-bit output, and there are eight different S-boxes. (The total memory requirement for the eight DES S-boxes is 256 bytes.) The 48 bits are divided into eight 6-bit sub-blocks.## What is inverse initial permutation in DES?

The overall formulas for DES Encryption Algorithm: Li = Ri−1. Ri = Li−1 ⊕ F(Ri−1,__K__i). 6.2 Perform a 32-bit swap on the result of the final round. Then, perform Inverse Initial Permutation (

**IP−1**) on the swapped data to produce the ciphertext 64 bits.## What is AES and DES in encryption?

Definition.

**AES stands for Advanced Encryption Standard**. DES stands for Data Encryption Standard. 2.