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Nakajima K.,NTT Corporation | Sillard P.,Prysmian Group | Richardson D.,University of Southampton | Li M.-J.,Corning Inc. | And 2 more authors.
IEEE Communications Magazine | Year: 2015

Space-division multiplexing technology is an attractive candidate for overcoming a potential future capacity crunch in optical networks based on conventional single-mode fiber. Transmission media for SDM optical communication systems can be designed based on both single-and multi-core concepts. This article investigates the potential of various SDM transmission media. © 1979-2012 IEEE. Source


Hong D.,Attached Institute of ETRI | Koo B.,Attached Institute of ETRI | Sasaki Y.,NTT Corporation | Sasaki Y.,University of Electro - Communications
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

In this paper, we improve previous preimage attacks on hash function HAS-160, which is standardized in Korea. We show that the last 68 steps out of 80 steps of HAS-160 can be attacked, while a previous attack works for only intermediate 52 steps. We also show that the first 67 steps of HAS-160 can be attacked. These attacks are based on the meet-in-the-middle attack, which is also used in the previous attack. Recently, various techniques of preimage attacks have been proposed on other hash functions. We show that these techniques can also be applied to HAS-160 and the number of attacked steps can be improved. For the attack on 68 steps, we first generate pseudo-preimages with a complexity of 2150.7, and then convert them to a preimage with a complexity of 2156.3. This attack uses a memory of 212 ×7 words. To the best of our knowledge, attacking 68 steps is the best of all attacks on HAS-160 hash function. © 2010 Springer-Verlag. Source


Trademark
N.T.T. Inc. | Date: 2013-04-11

Textile fabrics for home or craft use.


Trademark
N.T.T. Inc. | Date: 2014-05-27

Textile fabrics for home or craft use.


Trademark
NTT Corporation | Date: 2013-08-31

Electronic cigarette liquid (e-liquid) comprised of flavorings in liquid form used to refill electronic cigarette cartridges.

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