In Number Theory, Logic, and Cryptography

Discrete Logarithm Problem





Suppose that we have an equation

y = gx mod p

and that g and p are very large prime numbers, say, greater than 100 digits. Given g, p, and x, it takes a modern-day computer only a fraction of a second to calculate y.


The Discrete Logarithm Problem (DLP), is, given g, p, and y, can we find x, even if we have a million computers and a million years at our disposal?


For further information, please see:

[1] http://en.wikipedia.org/wiki/Discrete_logarithm

[2] http://www.cs.toronto.edu/~cvs/dlog/

[3] http://mathworld.wolfram.com/DiscreteLogarithm.html



You can check for contributions to this problem on the solutions page.



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Tim S Roberts

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