Information Security Applications: 13th International by Yanfeng Wang, Wenling Wu, Xiaoli Yu, Lei Zhang (auth.), Dong

By Yanfeng Wang, Wenling Wu, Xiaoli Yu, Lei Zhang (auth.), Dong Hoon Lee, Moti Yung (eds.)

This ebook constitutes the completely refereed post-workshop court cases of the thirteenth overseas Workshop on details safety functions, WISA 2012, held in Jeju Island, Korea, in August 2012.
The 26 revised complete papers provided including eight brief papers have been conscientiously reviewed and chosen from a hundred submissions. The papers are concentrating on all technical and sensible features of symmetric cipher, safe hardware/public key crypto software, cryptographic protocols/digital forensics, community safeguard, and belief management/database security.

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Extra info for Information Security Applications: 13th International Workshop, WISA 2012, Jeju Island, Korea, August 16-18, 2012, Revised Selected Papers

Sample text

4 If the equation does not hold, start a new guess. 5. As ΔXI 7,1 = ΔCr,l , ΔYI 7,1 = ΔCr,r , guess 9-bit KI 712 (K4 [0 − 8]), XI 7,1 is obtained by accessing the hash table T 1 . Then K7 = XI 7,1 ⊕ Cr,l , or K7 = XI 7,1 ⊕ Cr,l . The input difference of FI 13 is ΔXI 13 = ΔYI 11 ⊕ ΔPl,r , the output difference is ΔYI 1,3 = ΔPr,l ⊕ ΔPr,r , and KI 132 = K4 [0 − 8]. Then XI 13 is obtained by accessing 4 5R Since the pairs for which the differential (0, ΔPl ) → (ΔCr , 0) is impossible were already discarded in data collocation process Improved Impossible Differential Attacks on Reduced-Round MISTY1 25 the hash table T 1 .

As ΔXI 13 = ΔPr,l , ΔYI 13 = ΔPr,l ⊕ΔPr,r , and KI 131 = K4 [0−8], then XI 13 is obtained by accessing the hash table T 1 . 3. As ΔXI 73 = ΔCl,l , ΔYI 73 = ΔCr,l ⊕ ΔCr,r , guess 9-bit subkey KI 731 (K2 [0 − 8]), and XI 71 is obtained by looking up the hash table T 1 . Then we get the equivalent key K6 ⊕ (K4 [9 − 15] 00 K4[9 − 15]). 4. Guess 7-bit K4 [9−15], and deduce K6 from the above equivalent key. Then compute K6 by the key schedule algorithm. Since ΔXI 11 = ΔPl,l , ΔYI 11 = ΔPr,l , we get XI 11 by accessing the hash table T 1 .

There are two reasons for counting the Boolean functions satisfying one or several cryptographic criteria. Firstly, it indicates for which values of the parameters there is a chance of finding good cryptographic functions by random search. Secondly, a large number of functions is necessary if we want to impose extra constraints on the functions or if we want to use the function as part of the secret key. H. Lee and M. ): WISA 2012, LNCS 7690, pp. 43–54, 2012. c Springer-Verlag Berlin Heidelberg 2012 44 W.

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