What is MAC address in simple words?

What is MAC address in simple words?

A MAC address is a hardware identification number that uniquely identifies each device on a network. The MAC address is manufactured into every network card, such as an Ethernet card or Wi-Fi card, and therefore cannot be changed.

How can I get MAC address?

To Find the MAC Address: Open a Command Prompt -> type ipconfig /all and press Enter-> The Physical Address is the MAC address. Click Start or click in the search box and type cmd. Press Enter, or click on the Command Prompt shortcut.

What is the full form of NIC and Mac?

A media access control address (MAC address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. This use is common in most IEEE 802 networking technologies, including Ethernet, Wi-Fi, and Bluetooth.

What does MAC stand for in security?

A message authentication code (MAC), or tag, is a security code that is typed in by the user of a computer to access accounts or portals.

What is difference between hash and Mac?

Basically the main difference is MAC uses a private key and hash does not use any keys. Because of that MAC allows us to achieve authentication. A Hash is a summary or a finger print of a message and provide neither integrity nor authentication itself, as is it is susceptible to man-in-the-middle attack.

What is the difference between Mac and HMAC?

The main difference between MAC and HMAC is that MAC is a tag or a piece of information that helps to authenticate a message, while HMAC is a special type of MAC with a cryptographic hash function and a secret cryptographic key. Cryptography is the process of sending data securely from the source to the destination.

What do you mean by message authentication?

In information security, message authentication or data origin authentication is a property that a message has not been modified while in transit (data integrity) and that the receiving party can verify the source of the message.

Why do we need message authentication?

Authenticated encryption is a form of encryption that, in addition to providing confidentiality for the plaintext that is encrypted, provides a way to check its integrity and authenticity. …

What are the requirements of authentication?

11.1. Authentication Requirements

• Disclosure: Release of message contents to any person or process not possessing the appropriate cryptographic key.
• Traffic analysis: Discovery of the pattern of traffic between parties.
• Masquerade: Insertion of messages into the network from a fraudulent source.

How many types of message authentication functions are there?

three types

What are the two main varieties of authentication algorithms?

The first type of authentication algorithm, a message-authentication code (MAC), uses symmetric encryption. In MAC, a cryptographic checksum is generated from the message using a secret key. The second type of authentication algorithm, a digital-signature algorithm, uses a public and private key.

What is the difference between message integrity and message authentication?

The message authentication code, also referred to as digital authenticator, is employed as an integrity check supported a secret key shared by two parties to authenticate information transmitted between them. it’s supported employing a cryptographic hash or symmetric encryption algorithm.

How do you ensure message integrity?

The validity of a transmitted message. Message integrity means that a message has not been tampered with or altered. The most common approach is to use a hash function that combines all the bytes in the message with a secret key and produces a message digest that is difficult to reverse.

How do I get message authentication code?

Two parties must preshare a secret key (such as a DES key). Once shared, the sender may generate a HMAC by hashing the message with an algorithm such as MD5 or SHA-1, and then encrypting the hash with the preshared key via symmetric cipher such as DES.

What types of attacks are addressed by message authentication?

What types of attacks are addressed by message authentication? Content modification: Changes to the contents of the message. Sequence modification: Any modification to a sequence of messages between parties, including insertion, deletion and recording. Timing modification: Delay or replay of messages.

What is used to verify the integrity of a message?

Message Digest is used to ensure the integrity of a message transmitted over an insecure channel (where the content of the message can be changed). The message is passed through a Cryptographic hash function.

When two different message digests have the same value it is called?

In theory, two different files can have the same message digest value. This is called a collision. For a message digest function to be secure, it should be computationally infeasible to find or produce these collisions.

How do you verify data integrity?

Testing for Data Integrity

1. A blank value can be retrieved from the database.
2. Default values are saved if user input is not specified.
3. Strings have been truncated or numeric values rounded.
4. Removed records represent defunct, incorrect, or useless data.
5. Third party data matches your existing data rules before importing.

Which cryptographic algorithm is used in CMAC?

Which cryptographic algorithm is used in CMAC? Explanation: The CMAC algorithm uses triple DES and AES.