Professor Messer offers IT certification training for CompTIA A+, Network+, and Security+ exams, including free videos, course notes, practice exams, downloadable videos, pop quizzes, study group replays, and study recommendations.
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A reference cheat sheet documenting vulnerabilities in SSL/TLS protocol versions and cipher suites for security assessment purposes.
Collection of cybersecurity conference videos from GreHack 2018 covering various cutting-edge topics.
Curated list of acronyms and terms related to cyber security landscape with explanations beyond buzzwords.
A comprehensive guide to network security monitoring, teaching readers how to detect and respond to intrusions using open source software and vendor-neutral tools.
Intentionally vulnerable Kubernetes cluster environment for learning and practicing Kubernetes security.
Teaching Security provides educational resources and lessons for teaching cybersecurity concepts to high school students.
Comprehensive endpoint protection platform providing unified visibility and security for cloud workloads, endpoints, and containers.
A workshop offering resources for local privilege escalation on Windows and Linux systems.
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Mandos
Fractional CISO service that helps B2B companies implement security leadership to win enterprise deals, achieve compliance, and develop strategic security programs.

Checkmarx SCA
A software composition analysis tool that identifies vulnerabilities, malicious code, and license risks in open source dependencies throughout the software development lifecycle.

Orca Security
A cloud-native application protection platform that provides agentless security monitoring, vulnerability management, and compliance capabilities across multi-cloud environments.

DryRun
A GitHub application that performs automated security code reviews by analyzing contextual security aspects of code changes during pull requests.