Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Securing SSL Keys on your BIG-IP

Losing your keys is a real problem While losing your car keys is indeed a pain, I mean losing your Web Server Keys. Lost keys can expose your website to a Man in The Middle (MiTM) Attack. While in...
Published Jan 05, 2021
Version 1.0
API
application delivery
big-ip
keys
LTM
privacy
rsa
security
ssl
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šŸ” Senior Solutions Architect | API Security Specialist | AI & Post-Quantum Strategist I help organizations make sense of complex security challenges ā€” from securing modern API infrastructures to building zero trust architectures that scale. With deep expertise in F5 technologies, OAuth, and identity standards like FDX, I bridge the gap between technical execution and strategic innovation. Currently focused on: Leading AI security initiatives, including securing Large Language Models (LLMs) from emerging threats Evangelizing post-quantum cryptography (PQC) in real-world deployments Developing gamified Capture-the-Flag challenges to train engineers in offensive/defensive API tactics Advising on infrastructure transformation, security automation, and cloud-native rollouts Outside of work, I stay curious ā€” whether it's road-tripping across North America with a trailer and a plan, writing an upcoming book on AI threat mitigation, or creating unforgettable RPG characters who cast spells with swords. Letā€™s talk security, strategy, or why your TLS handshake failed at 3 a.m.
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Scheff
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Jan 06, 2021

, for sure you want to make sure you have the passphrases documented, "written down" might imply a sticky note on your monitor - that may not be the best. šŸ™‚

 

I will say, the passphrase on the key is stored within the config but it is protected by the master key - you don't actually need the Master Key itself to access the keys in the BIG-IP configuration. The passphrase on the key itself is the only thing that the BIG-IP user needs.

 

Thanx for the feedback!