The state-of-the-art quantum elliptic curve point addition circuit from Litinski fails to uncompute ancillas in four rare edge cases; this paper identifies and fixes them with only O(n) extra Toffoli gates.
Practical cryptography for developers: Elliptic curve cryptography (ecc)
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Validation of Quantum Elliptic Curve Point Addition Circuits
The state-of-the-art quantum elliptic curve point addition circuit from Litinski fails to uncompute ancillas in four rare edge cases; this paper identifies and fixes them with only O(n) extra Toffoli gates.