Applying Message Authentication Code (MAC) in text chatting system
نویسندگان
چکیده
منابع مشابه
Lecture 9: Message Authentication Code
In this lecture, we will study message authentication. This lecture is organized as follows. • First we will review the cryptographic algorithms that we have learned so far, and discuss their limitations in protecting data integrity and supporting message authentication. • Then we will examine the concept and the design of Message Authentication Code (MAC). I. REVIEW In the previous lectures, w...
متن کاملLecture 10: Message Authentication Code
In this lecture, we will study message authentication. This lecture is organized as follows. • First we will review the cryptographic algorithms that we have learned so far, and discuss their limitations in protecting data integrity and supporting message authentication. • Then we will examine the concept and the design of Message Authentication Code (MAC). I. REVIEW In the previous lectures, w...
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The cryptographic algorithms employed in Internet security must be able to handle packets which may vary in size over a large range. Most of the cryptographic hash algorithms process messages by partitioning them into large blocks. Due to this fact the messages have to be prepared by padding the required amount of zero bits to get an integer number of blocks. This process contributes a consider...
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We revisit the randomized approach followed in the design of the RMAC message authentication code in order to construct a MAC with similar properties, but based on WegmanCarter’s ε-universal hash families instead of a classical CBC chain. This yields a new message authentication code called FRMAC whose security bounds are, as in RMAC, beyond the birthday paradox limit. With efficient hash funct...
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Poly1305-AES is a state-of-the-art message-authentication code suitable for a wide variety of applications. Poly1305-AES computes a 16-byte authenticator of a variable-length message, using a 16-byte AES key, a 16-byte additional key, and a 16-byte nonce. The security of Poly1305-AES is very close to the security of AES; the security gap is at most 14DdL/16e/2 if messages have at most L bytes, ...
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ژورنال
عنوان ژورنال: TANMIYAT AL-RAFIDAIN
سال: 2008
ISSN: 2664-276X
DOI: 10.33899/tanra.2008.161723