Elliptic Curve Point

asked 2016-04-16 01:10:36 -0500

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i am doing this to find out Double point on elliptic . for prime field 5 if P=(0,3) 2P=(1,3)


my resullt after performing point doubling is in the form of i am getting P=(3a) and 2P= (z+3a+4) which is represent (4,3) but i want (1,3) that is (z+3*a+1) how i will obtained

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