Black-Box Models of Computation in Cryptology (repost)
Tibor Jager, "Black-Box Models of Computation in Cryptology"
2012 | ISBN: 3834819891 | PDF | 98 pages | 0,5 MB
2012 | ISBN: 3834819891 | PDF | 98 pages | 0,5 MB
Generic group algorithms solve computational problems defined over algebraic groups without exploiting properties of a particular representation of group elements. This is modeled by treating the group as a black-box. The fact that a computational problem cannot be solved by a reasonably restricted class of algorithms may be seen as support towards the conjecture that the problem is also hard in the classical Turing machine model. Moreover, a lower complexity bound for certain algorithms is a helpful insight for the search for cryptanalytic algorithms. Tibor Jager addresses several fundamental questions concerning algebraic black-box models of computation: Are the generic group model and its variants a reasonable abstraction? What are the limitations of these models? Can we relax these models to bring them closer to the reality?