A research paper presented at USENIX Security 2023, ProSpeCT proposes a new approach to secure speculation for the constant-time policy. It aims to mitigate the risks of side-channel attacks by ensuring that execution time remains constant, regardless of the input data. The paper discusses the challenges of securing speculation in modern processors and provides a formal proof of security for their proposed solution. The research is significant for its contribution to secure computing and its potential impact on protecting sensitive data from malicious attacks.