Finding state collisions in the authenticated encryption stream cipher ACORN
Salam, Md Iftekhar, Wong, Kenneth Koon-Ho, Bartlett, Harry, Simpson, Leonie, Dawson, Ed, & Pieprzyk, Josef (2016) Finding state collisions in the authenticated encryption stream cipher ACORN. In ACSW '16 Australasian Computer Science Week, 2 - 5 February 2016, Canberra, A.C.T.
This paper analyzes the authenticated encryption algorithm ACORN, a candidate in the CAESAR cryptographic competition. We identify weaknesses in the state update function of ACORN which result in collisions in the internal state of ACORN. This paper shows that for a given set of key and initialization vector values we can construct two distinct input messages which result in a collision in the ACORN internal state. Using a standard PC the collision can be found almost instantly when the secret key is known. This flaw can be used by a message sender to create a forged message which will be accepted as legitimate.
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|Item Type:||Conference Paper|
|Keywords:||CAESAR, Authenticated encryption, AEAD, stream cipher, ACORN, collision, integrity, symmetric encryption, MAC|
|Subjects:||Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > COMPUTATION THEORY AND MATHEMATICS (080200) > Analysis of Algorithms and Complexity (080201)
Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > DATA FORMAT (080400) > Data Encryption (080402)
|Divisions:||Current > Schools > School of Electrical Engineering & Computer Science
Current > Schools > School of Mathematical Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2016 The Author(s)|
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|Deposited On:||01 Aug 2016 22:35|
|Last Modified:||03 Aug 2016 00:56|
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