performing the conversion manually using the above maps in such rare circumstances.</p>

<p>Points can also be described in terms of their compressed coordinates. For a point (x, y), for any given value for x such that the point is on the curve there will only ever be two possible values for y. Therefore, a point can be set using the EC_POINT_set_compressed_coordinates() function where <b>x</b> is the x coordinate and <b>y_bit</b> is a value 0 or 1 to identify which of the two possible values for y should b