What does CMAC mean in UNCLASSIFIED
CMAC (Chaining Message Authentication Code) is a cryptographic algorithm used to ensure data integrity and authentication. It is a block cipher-based MAC (Message Authentication Code) that generates a fixed-size authenticator for a given message.
CMAC meaning in Unclassified in Miscellaneous
CMAC mostly used in an acronym Unclassified in Category Miscellaneous that means Chaining Message Authentication Code
Shorthand: CMAC,
Full Form: Chaining Message Authentication Code
For more information of "Chaining Message Authentication Code", see the section below.
CMAC Mechanism
CMAC operates by iteratively encrypting the message blocks with a secret key. The output of each encryption is then chained with the previous one, forming a cumulative value. Finally, the last encrypted block undergoes a modification and is XORed with the cumulative value to produce the authenticator.
Properties of CMAC
- Integrity: CMAC detects any unauthorized modifications to the message, as even a single bit change will result in a different authenticator.
- Authentication: CMAC ensures that the message originated from the intended sender who possesses the secret key.
- Efficiency: CMAC is relatively efficient to compute, making it suitable for real-time applications.
Applications of CMAC
- Data integrity protection: Securing data stored in databases, files, or across networks.
- Message authentication: Verifying the authenticity of messages in protocols such as TLS and SSH.
- Digital signatures: Generating digital signatures for electronic documents.
Essential Questions and Answers on Chaining Message Authentication Code in "MISCELLANEOUS»UNFILED"
What is CMAC?
CMAC (Cipher-based Message Authentication Code) is a cryptographic algorithm that provides data integrity and authentication services. It utilizes a block cipher, such as AES or DES, and a message to generate a fixed-size authentication tag. The tag is then appended to the message, allowing a recipient to verify the authenticity and integrity of the data.
What is the purpose of CMAC?
CMAC is primarily used to protect the integrity and authenticity of electronic messages or data. It ensures that messages have not been tampered with or altered during transmission or storage. CMAC is commonly employed in applications such as wireless sensor networks, mobile communications, and financial transactions.
How does CMAC work?
CMAC operates using a block cipher algorithm, where the input message is divided into blocks of a specific size. The cipher is iteratively applied to these blocks, along with a secret key and a chaining value, to generate the authentication tag. The tag is a condensed representation of the message and key, and any alterations to the message will result in a different tag.
What are the advantages of using CMAC?
CMAC offers several advantages, including:
- Strong security: CMAC provides a high level of security against message tampering and forgery.
- Efficiency: It is a relatively efficient algorithm, suitable for use in resource-constrained environments.
- Simplicity: CMAC is straightforward to implement and integrate into various applications.
What are the applications of CMAC?
CMAC finds applications in various areas, such as:
- Data integrity protection in mobile communications, wireless sensor networks, and IoT devices.
- Authentication of firmware updates and software packages.
- Message authentication in financial transactions and electronic signatures.
Final Words: CMAC is a robust and widely used MAC algorithm that provides reliable data integrity and authentication. Its efficiency and cryptographic strength make it an ideal choice for various security applications where the protection of data and message authenticity is paramount.
CMAC also stands for: |
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| All stands for CMAC |