It illustrates research about the role that quantum-enhanced digital signatures play in enhancing cryptographic security vis-à-vis the prospects of attack by quantum computers. The research method used is in steps, which considers several qualities of quantum-enhanced digital signatures. Literature Review: Vulnerability of classical cryptosystems; prospects for quantum resistance. A comparative analysis juxtaposes the contrasting differences of the classical and quantum-enhanced signature schemes in respect of security against Shor’s and Grover’s algorithms as well as with respect to the computational efficiency and resource needs in terms of scalability. Case studies and experimentation and simulation elaborate on and detail different applications of such signature schemes under different kinds of attacks with a view towards their performance metric evaluation, key generation time, and verification speed, among others. Security analysis deals with the quantum-specific threats and hybrid approaches of both classical and quantum cryptography. In the Practical Feasibility Evaluation, one considers hardware requirements, cost implications, scalability, and application areas in the deployment of quantum-enhanced signatures. The study also reviews emerging standards and protocols to ensure that quantum-enhanced digital signatures align with post-quantum cryptography guidelines, identifying gaps in current standards that need to be addressed for broad adoption. Finally, actionable recommendations and future directions are proposed, including strategies for transitioning to quantum-secure systems and advancing cryptographic research. Different simulations of signature schemes, namely lattice-based, hash-based, and multivariate, under various attack scenarios underscore their robustness against both classical and quantum threats. Results show that the digital signatures are highly enhanced by quantum in terms of security against quantum algorithms, computational efficiency, and scalability. This study further confirms that systems enhanced by quantum have practical feasibility in terms of deployment despite hardware and cost-related challenges while indicating the critical industries that may be suitable for application. Overall, the findings suggest that the future quantum-computing environment does demand the adaptation of quantum-enhanced digital signatures to ensure long-term cryptographic security.