SM4

AcronymDefinition
SM4Shader Model 4.0 (high level shader language that is part of the Direct 3D 10 API)
SM4Servicing Mission #4 (Hubble Telescope)
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References in periodicals archive ?
SM4 receives more attention from the cryptographic community and a lot of cryptanalytic results for SM4 have been produced.
In terms of the number of rounds that all the previous attacks for SM4 can work, the best key recovery attacks on SM4 are linear cryptanalysis and differential cryptanalysis, and both of them are based on 19-round distinguishers.
We design a new search algorithm for the iterative linear approximations for small rounds of SM4 by gradually expanding the partial linear approximation table of S-box.
The best previous attacks can work on 23-round SM4. Utilizing our identified 20-round linear approximation of SM4, we give a key recovery attack on 24-round SM4, which is the best attack according to the number of rounds for SM4.
<div class="imageBox" style="width: 428px;"><img src="http://img.ibtimes.com/www/data/articles/full/2009/09/09/3527.jpg" alt="Galactic Wreckage in Stephan's Quintet A clash among members of a famous galaxy quintet reveals an assortment of stars across a wide color range, from young, blue stars to aging, red stars.(Photo: NASA, ESA, and the Hubble SM4 ERO Team)" width="428" />
<div class="caption">Galactic Wreckage in Stephan's Quintet A clash among members of a famous galaxy quintet reveals an assortment of stars across a wide color range, from young, blue stars to aging, red stars.(Photo: NASA, ESA, and the Hubble SM4 ERO Team)</div>
<div class="imageBox" style="width: 428px;"><img id="3533" class="imgPhoto" src="http://img.ibtimes.com/www/data/articles/full/2009/09/09/3533.jpg" alt="Fingerprinting the Distant Universe Using Light from Quasar PKS 0405-123 Using a distant quasar as a cosmic flashlight, a new instrument aboard NASA's Hubble Space Telescope has begun probing the invisible, skeletal structure of the universe.(Photo: NASA, ESA, and the Hubble SM4 ERO Team)" width="428" />
<div class="caption">Fingerprinting the Distant Universe Using Light from Quasar PKS 0405-123 Using a distant quasar as a cosmic flashlight, a new instrument aboard NASA's Hubble Space Telescope has begun probing the invisible, skeletal structure of the universe.(Photo: NASA, ESA, and the Hubble SM4 ERO Team)</div>
SM4 would attempt to repair this important instrument.
A)Tonight with Jools Holland B) Tomorrow with Jools Holland C) Later with Jools Holland BY TELEPHONE: Call 0901 229 2395 and follow the instructions BY TEXT: SM4 followed by a space and your answer, your name, house number and postcode to 84080.
By Text: Text SM4 followed by a space and your answer, your name, house number and postcode to 84080.