nullcon HackIM – 2017 – Crypto 2

Here is how to resolve the challenge “Breaking Bad Key Exchange” provided, during a CTF, by nullcon HackIM in February 2017:

cryptopuzzle2
nullcon HackIM – 2017 – cryptopuzzle2

Hint 1 : in the range (1 to g*q), there are couple of pairs yielding common secrete as 399.
Hint 2 : ‘a’ and ‘b’ both are less than 1000

Flag Format: flag{a,b}

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