Assume d is a 128 bit random integer and P is base point of an elliptic curve and Q = dP is a point on the elliptic curve and SHA is a hash function with 128 bit output, my question is:
Is size Q equal to size SHA(Q)?
If not, then wich is smaller size?
closed as unclear what you're asking by minar, e-sushi, rath, D.W., Paŭlo Ebermann♦ Aug 25 '13 at 12:16
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This was answered in the Comments of the math.stackex:
Meaning no, they're not equal SHA-1 is larger.