M. Davio, Y. Desmedt, J. Goubert, F. Hoornaert, and J. J. Quisquater. Efficient Hard- ware and Software Implementations for the DES. In G. R. Blakley and D. Chaum, editors, Advances in Cryptology -- CRYPTO '8, volume LNCS 196, pages 144-146, Berlin, Germany, 1985. Springer-Verlag.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....processor implementations. In researching previ ous implementations of block ciphers in hardware, it was found that the most frequently implemented algorithms are DES, IDEA, and the AES candidate algorithms. 2. 2 Commercial Hardware Implementations The earliest VLSI implementations of DES [40, 143] achieved throughputs ranging from 20 to 32 Mbps using 3 m technology. The variances in throughput are compared and contrasted based upon speed versus area tradeoffs. The implementations support multiple modes of operation, including Electronic Code Book (ECB) Cipher Block Chaining (CBC) Cipher ....

M. Davio, Y. Desmedt, J. Goubert, F. Hoornaert, and J. J. Quisquater. Efficient Hard- ware and Software Implementations for the DES. In G. R. Blakley and D. Chaum, editors, Advances in Cryptology -- CRYPTO '8, volume LNCS 196, pages 144-146, Berlin, Germany, 1985. Springer-Verlag.

.... This estimate is based on the Pentium based figures that a single DES block encryption with a fixed key requires 360 Pentium clock cycles (cf. 7] or 500 Pentium clock cycles with a variable key (cf. 2] Furthermore, our estimate lies between two DEC VAX 11 780 estimates that can be found in [8] and [24] It follows that our Mips Years convention is sufficiently accurate. Half a million Mips Years is roughly 13,500 months on a PC. This is equivalent to 4 months on 3,500 PCs, because an exhaustive key search can be evenly divided over any number of processors. For a proper security ....

M. Davio, Y. Desmedt, J. Goubert, F. Hoornaert, J.J. Quisquater, Efficient hardware and software implementations of the DES, Proceedings Crypto84.

.... This estimate is based on the Pentium based figures that a single DES block encryption with a fixed key requires 360 Pentium clock cycles (cf. 7] or 500 Pentium clock cycles with a variable key (cf. 2] Furthermore, our estimate lies between two DEC VAX 11 780 estimates that can be found in [8] and [22] It follows that our Mips Years convention is sufficiently accurate. Half a million Mips Years is roughly 13500 months on a PC. This is equivalent to 4 months on 3500 PCs, because an exhaustive key search can be evenly divided over any number of processors. For a proper security ....

M. Davio, Y. Desmedt, J. Goubert, F. Hoornaert, J.J. Quisquater, Efficient hardware and software implementations of the DES, Proceedings Crypto'84.

....DES program, speed des executes faster because fewer (4) memory references are needed. The E expansion technique used for speed des has little advantage over a combined SPE table for machines that are 48 bits wide or wider. Davio, et al. present a very sketchy paper on a software DES implementation[3]. It is very difficult to determine anything about the implementation from the paper except for the speed. They claim a speed of 150 kbit second on a VAX 11 780, which is twice the speed of the speed des implementation presented in this paper. However, it is difficult to evaluate the validity of ....

....needed to reduce the number of table lookups. Table 5 shows the speed of speed des compared with other DES implementations. The implementation by Davio seems to be twice as fast as speed des, although it is hard to evaluate the validity of this claim from the information presented in the paper[3]. In particular, their DES may not include block chaining and if performance was tested in a loop rather than by encrypting a string of random numbers, then the cache would allow the program to run faster than it would when actually performing an encryption. The reason that implementations by ....

Marc Davio, Yvo Desmedt, Jo Goubert, Frank Hoornaert, and Jean-Jacques Quisquater, "Efficient hardware and software implementations for the DES", In Proceedings of Crypto '84, pages 144--146, August 1984.

....the internal data transport on chip. How the feedback loop can be combined with the pipeline is plained in Fig. 6 for the same CBC mode (encryption. and decryption) The newly entered data are xoted with he enciphered data while they are transferred from the I O to the DES part or vice versa [4] [5]. This mode calculation is done on the fly betwe en every two pipeline stages as shown in Fig. 7. This technique of mode calculation does Fig. 6. b) c) Mode calculation combined with internal transport: a) ECB, b) CBCenc, and (c) CBCdec. pipdine ) Fig. 7. Fast internal mode calculation ....

....IP is byte oriented and so can be realized with a shift technique [4] IP is calculated when going on off chip. Instead of two 64 bit complex channel routings, one for IP and one for IP 1, the 64 bit I O register is arranged as a concatenation of eight shift registers of 8 bits. One can prove [5] that this shift register concatena tion together with a small floor plan reorganization corresponds to the initial permutation IP. As can be seen in Fig. 10, no scrambling routing remains. Shifting the result back after the DES round calculations and reading it out byte per byte performs IP 1. ....

M. Davio; Y. Desmedt, J. Goubert, F. Hoornaert, and J.-J. Quisquater, "Efficient hardware and software implementations of the DES," in Advances in Cryptology, Proc. Crypro 84, Aug. 1984.

No context found.

M. Davio, Y. Desmerit, J. Goubert, F. Hoornaert, and J.-J. Quisquater, "Efficient hardware and software implementations of the DES," Advances in Cryptologll, Proceedings CRtWTO-84, August 84.

No context found.

Marc Davio, Yvo Desmedt, Jo Goubert, Frank Hoornaert, and Jean-Jacques Quisquater. Efficient hardware and software implementations for the DES. In Proceedings of Crypto '84, pages 144--146, August 1984.

No context found.

M. Davio, Y. Desmedt, J. Goubert, F. Hoornaert, J. Quisquater, Efficient hardware and software implementations for the DES, Crypto '84, LNCS 196, Springer-Verlag, Berlin 1985, pp. 144-146.

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