The paper argues that effective cybersecurity in cloud-native environments requires a balanced strategy combining shift-left and shield-right approaches. Shift-left focuses on identifying and reducing vulnerabilities early through SAST, SCA, IaC scanning, and automated CI/CD testing, but it is limited by developer expertise, complex dependency chains, incomplete test coverage, and the inability to predict novel threats. Shield-right, or runtime security, is essential to protect running workloads from ransomware, cryptomining, misconfigurations, identity abuse, and other attacks that bypass pre-deployment controls. The paper highlights high real-world exposure, including widespread patchable vulnerabilities and public cloud misconfigurations, and emphasizes runtime detection, response, and

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