Monitor Certificate Transparency logs using crt.sh and Certstream to detect phishing domains, lookalike certificates, and unauthorized certificate issuance targeting your organization.
Install
npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill analyzing-certificate-transparency-for-phishingnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill analyzing-certificate-transparency-for-phishing -a claude-code -gnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill analyzing-certificate-transparency-for-phishing -a codex -ggemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/analyzing-certificate-transparency-for-phishinggh skill install mukul975/Anthropic-Cybersecurity-Skills analyzing-certificate-transparency-for-phishinggit clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills /tmp/mukul975__Anthropic-Cybersecurity-Skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/analyzing-certificate-transparency-for-phishing ~/.claude/skills/analyzing-certificate-transparency-for-phishing # Claude Code
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/analyzing-certificate-transparency-for-phishing ~/.agents/skills/analyzing-certificate-transparency-for-phishing # Codex, Cursor, Gemini CLI, Copilot, OpenCode