Digital signatures provide a means to publicly authenticate messages sent over an insecure channel. Recently, the Quotient Digital Signature Algorithm (qDSA) was introduced aiming key-compatibility with the Diffie-Hellman X25519 function. Due to the novelty of qDSA, there remains a need for an optimized implementation that allows identifying the real impact of this new algorithm. In this work, we focus on the secure and efficient implementation of qDSA. By leveraging the use of precomputation on the right-to-left Joye’s algorithm, we reduced the running time of signature generation by 30–35