Better decryption

[osuketh]

Related: #86

• Parallelize decryption
• Add start parameter for efficient

zero-chain/core/crypto/src/elgamal.rs

Lines 77 to 82 in 1fd2324

	// FIXME: Brute-force decrypt balance for [0, 2^32-1]
	for i in 0..u32::MAX {
	if find_point(i, &v_point, p_g, params) {
	return Some(i);
	}
	}