M. Matsui, "New Block Encryption Algorithm MISTY", in Proc. of the 4th International Fast Software Encryption Workshop, Haifa, Israel, 1997, pp. 54--68.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....the resulting designs are very e#cient as we will underline in section 7. 5 Block cipher description: MISTY1 MISTY1 is an iterated block cipher that operates on a 64 bit block with a 128 bit key and with a variable number of rounds n. We describe the algorithm with n = 8, as recommended in [3, 4]. In the following subsections, we describe the data randomizing part and the key scheduling part of MISTY1 with their di#erent components. 5.1 Data randomizing part Figure 9 shows the data randomizing part of MISTY1 . The 64 bit plaintext P is divided in two 32 bit parts. Both parts are ....

.... x2x5 x4x5 x2x7 x5x7 x8 x0x8 x4x8 x6x8 x7x8 1 y7 = x1 x0x1 x1x2 x2x3 x0x4 x5 x1x6 x3x6 x0x7 x4x7 x6x7 x1x8 1 y8 = x0 x0x1 x1x2 x4 x0x5 x2x5 x3x6 x5x6 x0x7 x0x8 x3x8 x6x8 1 Both substitution boxes are defined as ROM tables in [3]. To optimize the number of logic cells used in FPGA implementations, we prefer to implement S 7 and S 9 functions directly as logical expressions. With enough pipelined stages, we keep the critical path of the design under control. 5.2 Key scheduling part Figure 10 shows the key scheduling part ....

Mitsuru Matsui, New Block Encryption Algorithm MISTY, The 4th Fast Software Encryption Workshop, Jan. 1997, available from http://www.cosic.esat.kuleuven.ac.be/nessie/

....3: A four round fourth order integral for Rijndael with 2 texts. improved. The improvement is in the key search part of the attack) Table 3 depicts this four round fourth order integral. 4 MISTY Integrals can be used to attack some reduced round variants of Matsui s MISTY1 and MISTY2 [26]. We refer to the MISTY specifications [26] for the description of these ciphers and for the notation used in the following. In earlier work, Sakurai and Zheng noted the following property of the MISTY2 round function [31] Let F (x, y) denote the left half of the output of three rounds of MISTY2 ....

....for Rijndael with 2 texts. improved. The improvement is in the key search part of the attack) Table 3 depicts this four round fourth order integral. 4 MISTY Integrals can be used to attack some reduced round variants of Matsui s MISTY1 and MISTY2 [26] We refer to the MISTY specifications [26] for the description of these ciphers and for the notation used in the following. In earlier work, Sakurai and Zheng noted the following property of the MISTY2 round function [31] Let F (x, y) denote the left half of the output of three rounds of MISTY2 on plaintext y#. They observe that F ....

M. Matsui, "New Block Encryption Algorithm MISTY", Fast Software Encryption, LNCS 1267, Springer-Verlag, 1997, pp. 54--68.

....the original Square attack of FSE 97 [5] but the running time is greatly improved. The improvement is in the key search part of the attack) Table 3 depicts this four round fourth order integral. 4 MISTY Integrals can be used to attack some reduced round variants of Matsui s MISTY1 and MISTY2 [24]. We refer to the MISTY speci cations [24] for the description of these ciphers and for the notation used in the following. In earlier work, Sakurai and Zheng noted the following property of the MISTY2 round function [28] Let F (x; y) denote the left half of the output of Table 3. A four round ....

....but the running time is greatly improved. The improvement is in the key search part of the attack) Table 3 depicts this four round fourth order integral. 4 MISTY Integrals can be used to attack some reduced round variants of Matsui s MISTY1 and MISTY2 [24] We refer to the MISTY speci cations [24] for the description of these ciphers and for the notation used in the following. In earlier work, Sakurai and Zheng noted the following property of the MISTY2 round function [28] Let F (x; y) denote the left half of the output of Table 3. A four round fourth order integral for Rijndael with ....

M. Matsui. New block encryption algorithm MISTY. In E. Biham, editor, Fast Software Encryption, Fourth International Workshop, Haifa, Israel, January 1997,

....and other decorrelation theory based ones. Interestingly, the d = 2 case already provides formal security against possible formalizations of di erential and linear cryptanalysis. The Nyberg Knudsen approach [16] was the only previously known way to achieve similar security statements (with MISTY [13,14] as a famous example. The MISTY approach however does not provide much design exibility, and the DFC approach seems to achieve stronger results as shown in Section 4. Besides, the Nyberg Knudsen approach is indeed an ad hoc construction for providing security against di erential and linear ....

....characterizes ciphers for which di erentials can nicely be piled up. For these ciphers we can formally prove the heuristic security arguments against di erential cryptanalysis on average over the key space. Another more formal approach on which seldom block ciphers are based (including MISTY [13,14]) is inherited by Nyberg Knudsen Theorem [16] It consists of using ad hoc constructions with heavy non linear constraints on Sboxes and deducing that the block cipher has no good di erential property on average on the key distribution. These results are however limited to di erential (and linear) ....

M. Matsui. New Block Encryption Algorithm MISTY. In Fast Software Encryption, Haifa, Israel, Lectures Notes in Computer Science 1267, pp. 54-68, Springer-Verlag, 1997.

....differential. 6 This result makes it possible to construct Feistel ciphers with few rounds which are provably resistant against conventional differential cryptanalysis (for example, four rounds with best differential probability 2 61 ) Examples of such ciphers are KN [26] 7 and MISTY [20]. Notice however that any four and five round Feistel cipher has lots of impossible differentials, which are independent of the exact properties of the round 6 A better bound of p 2 was proved later by Aoki and Ohta. 7 Recently broken by high order differential techniques [28, 14] 12 ....

M. Matsui, New Block Encryption Algorithm MISTY, Lecture Notes in Computer Science 1267, Fast Software Encryption - 4th International Workshop (FSE'97), pp.54--68, Springer-Verlag, 1997.

....f9 UMTS de nes two mandatory encryption algorithms: UEA0 is a null cipher (no con dentiality algorithm) whereas UEA1 is a cipher called Kasumi [Wal00] Other algorithms are also possible, but implementing these algorithms is mandatory. Kasumi is a derivative of a block cipher called Misty [Mat97], another Japanese algorithm. For integrity, UIA1 is Kasumi. There is no null integrity option. Kasumi (and its test data) are de ned in 3GPP 35 series documents, which were at rst publicly and directly downloadable from the Internet. Unfortunately, at the time of Ciphering in GPRS and UMTS 17 ....

Mitsuru Matsui. New block encryption algorithm MISTY. In Eli Biham, editor, Fast Software Encryption: 4th International Workshop, volume 1267 of Lecture Notes in Computer Science, pages 5468, Haifa, Israel, 2022 January 1997. Springer-Verlag. Ciphering in GPRS and UMTS 20

....of designing block ciphers using Matsui s structure with high performance and security against known attacks. The known attacks include the algebraic attacks such as higher order differential attack[9, 6] as well as differential and linear attacks. The block cipher MISTY, also proposed by Matsui[13], adopts this structure and is guaranteed to be provably secure against differential and linear attacks. The substitution boxes of MISTY are composite functions of some affine functions and power functions over GF(2 7 ) and GF (2 9 ) which are bijective, almost bent, and almost perfect ....

....Execution time Extension degree (n) all Figure 6: Execution time of x 3 over GF(2 n ) s. f f f m m 1 2 1 2 3 zero extend truncate zero extend Figure 7: Matsui s recursive structure Figure 7 shows the most inner part of the recursive structure described in [13]. When the input string is divided into m 1 bit and m 2 bit (m 1 m 2 ) this division is denoted by [ m 1 ; m 2 ] For the structure shown in Figure 7, the following theorem is proved[13] We find the block cipher with high speed and maximal differential linear probability 2 062 using this ....

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M. Matsui, "New Block Encryption Algorithm MISTY," in Proc. of the Fast Software Encryption Workshop, pp.53--67, 1997.

....and Murphy [LMM91] and first implemented by Nyberg and Knudsen [NK95] has been one of the primary criteria used to confirm the potential quality of each cipher. Unfortunately, few approaches to proving security have been really successful. The original approach of [NK95] has been used in MISTY [Mat97] and its variant KASUMI [ETS99] the new 3GPP block cipher standard) Another influential approach has been the wide trail strategy of Daemen [Dae95] applied for example in the proposed AES, Rijndael [DR98] The main reason for the small number of successful strategies is the complex structure ....

Mitsuru Matsui. New Block Encryption Algorithm MISTY. In Eli Biham, editor, Fast Software Encryption '97, volume 1267 of Lecture Notes in Computer Science, pages 54--68, Haifa, Israel, January 1997. Springer-Verlag.

....in 2000. It is one of the proposals submitted to ISO IEC JTC 1 SC 27 for consideration as an international encryption standard. The joint e#ort combines expertise in cipher design from both companies. As a result, Camellia certainly bears some nice features of E2 [9] designed by NTT) and MISTY [5] (designed by Mitsubishi) In this note, we describe some observations on Camellia in terms of its security. Our analysis is based on the specification of Camellia [1] a short proposal to ISO [11] as well as existing analysis on E2 [10] and MISTY [5] The main objectives of our analysis is to ....

....features of E2 [9] designed by NTT) and MISTY [5] designed by Mitsubishi) In this note, we describe some observations on Camellia in terms of its security. Our analysis is based on the specification of Camellia [1] a short proposal to ISO [11] as well as existing analysis on E2 [10] and MISTY [5]. The main objectives of our analysis is to give some outsider s opinions on the design of Camellia and to contribute to the continued analysis of the cipher. The note is organized as follows: In Sections 2 through 4 we make some observations and ask a few questions regarding the major components ....

[Article contains additional citation context not shown here]

M. Matsui. New Block Encryption Algorithm MISTY. In Proceedings of the 4th Fast Software Encryption Workshop, 1997.

.... a b j ; 9 9 T I KBg 0MB8 9 k 3 N 3 H O = U H K F O F V k NCf H G O J F V k N 5 : K BAu8zN( 0MB8 9 k 3 H r0UL# 9 k 0lJ O I G N F V k;2 H O F V k NFbMF K h C F OD O M 2sO) rAH 3 H K h C F9bB. D . 7 2= B8= G k l9g , k[10] 3 N 3 H O O I K F O F V k NCf H , BAu8zN( K0MB8 9 k 3 H r0UL# 9 k 0BA4 NE i O 0l EY N F V k;2 H G i s rBg e 2 k 3 H , G k H D9=j , k 3 l i N9M; HA0 a N 7W4p= i 2f 9 O0J2 N h J 7WJ K r:NMQ 7 A) ....

.... F k h K 9 k 3 H ,2DG= G k Camellia G O GF(2 8 ) e N5U t4X t H4 oN N U # sJQ49 rAH 9g o ; k 3 H K h C F 4 D Ns box H 7 F k O 1 D Ns box H4 D N U # sJQ49 NAH9g ; H 7 F B Au 9 k J I BAu4D6 K1 8 F= Fp KBP=h 9 k 3 H , G k 2.3. 3 FL=FL Gamma1 4X t MISTY[10] G;H o l F kFL 4X t HF1 8H A[ K 4p E Jd=uJQ49It G k 9 J o A 80 K h C F:GNI :9J, 7AI=8= rJQ2= 5 ; k H H b K :9J,967b d 7A 967b0J30 N2rFI N2DG= r b7Z8: 5 ; k 3 H r4 BT 7 F k 9=B H 7 FO M 1i; 5Z S8GDj m F 7 g s 1 K h C F B8= 9 k 3 H G G= KBg J1F ....

Matsui, "New Block Encryption Algorithm MISTY," Fast Software Encryption --- 4th International Workshop FSE'97, LNCS 1267, 1997.

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M. Matsui, "New Block Encryption Algorithm MISTY", Fast Software Encryption - 4th International Workshop (FSE'97), LNCS 1267, Springer Verlag, 1997, pp.54-68

....can encrypt a data stream in CBC mode at a speed of 57Mbps and 40Mbps on Pentium II 266MHz and PA 7200 120MHz, respectively. For its hardware performance, we have produced a prototype LSI by a process of 0.8micron CMOS gate array and confirmed a speed of 512Mbps. 2. Algorithm Description Algorithm [1] could be divided into two parts, namely key scheduling part and data randomizing part . Key scheduling part takes a 128bit input key and produces a 128 bit expanded key. Data randomizing Ohta Matsui Informational [Page 1] RFC2994 RFC.net Page 2 of 11 RFC 2994 MISTY1 November 2000 part takes ....

M. Matsui, "New Block Encryption Algorithm MISTY", Fast Software Encryption - 4th International Workshop (FSE'97), LNCS 1267, Springer Verlag, 1997, pp.54-68

....that encryption and decryption procedures are the same except for the order of the subkeys. In Camellia, FL FL 1 function layers are inserted every 6 rounds, but this property is still preserved. The design criteria of FL and FL 1 functions are similar to those of the FL function of MISTY [23]. The di#erence between MISTY and Camellia is the addition of 1 bit rotation. This is expected to make bytewise cryptanalysis harder, but it has no negative impact on hardware size or speed. The design criteria are that these functions must be linear for any fixed key and that their forms depend ....

M. Matsui, "New Block Encryption Algorithm MISTY," Fast Software Encryption, FSE'97, Lecture Notes in Computer Science 1267, pp.54--68, Springer-Verlag, 1997.

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M. Matsui, "New Block Encryption Algorithm MISTY", in Proc. of the 4th International Fast Software Encryption Workshop, Haifa, Israel, 1997, pp. 54--68.

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M. Matsui, "New Block Encryption Algorithm MISTY", in Proc. of the 4th International Fast Software Encryption Workshop FSE'97, 1997, pp. 54--68.

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M. Matsui, "New block encryption algorithm MISTY," in Proceedings of Fast Software Encryption - FSE'97, vol. 1267 of Lecture Notes in Computer Science, pp. 54--68, Springer-Verlag, 1997.

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M. Matsui, "New block encryption algorithm Misty," Fast Software Encryption '97, LNCS 1267, E. Biham, Ed., Springer-Verlag, 1997, pp. 64--74.

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M. Matsui. New block encryption algorithm MISTY. In E. Biham, editor, Fast Software Encryption: 4th International Workshop, Volume 1267 of Lecture Notes in Computer Science, pages 54--68, Haifa, Israel, 20--22 Jan. 1997. Springer-Verlag.

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M. Matsui. New block encryption algorithm MISTY. In E. Biham, editor, Fast Software Encryption: 4th International Workshop, volume 1267 of Lecture Notes in Computer Science, pages 54--68, Haifa, Israel, 20--22 Jan. 1997. Springer-Verlag.

No context found.

M. Matsui, "New block encryption algorithm Misty," Fast Software Encryption '97, LNCS 1267, E. Biham, Ed., Springer-Verlag, 1997, pp. 64--74.

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M. Matsui, "New block encryption algorithm MISTY." In Eli Biham, editor, Fast Software Encryption: 4th International Workshop, volume 1267 of Lecture Notes in Computer Science, pages 54-68, Haifa, Israel, 20-22 January 1997. Springer-Verlag

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M. Matsui. New block encryption algorithm MISTY. Fast Software Encryption, FSE '97, LNCS 1267, pp. 54--68, Springer-Verlag.

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M. Matsui. New block encryption algorithm MISTY. In E. Biham, editor, Fast Software Encryption, 4th International Workshop, FSE '97, Haifa, Israel, January 20-22, 1997.

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Matsui, M.: New Block Encryption Algorithm MISTY. In Biham, E., ed.: Fast Software Encryption, 4th International Workshop, FSE '97. Volume 1267 of LNCS., Springer-Verlag (1997) 54--68

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M. Matsui, New Block Encryption Algorithm MISTY, Proceedings of Fast Software Encryption '97, LNCS 1267, pp. 54--68, Springer-Verlag, 1997.

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