How to read JMeter test as a readable text response?
Recorded scripts:
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OSCP stands for Online Certificate Status Protocol, so you need to decode it via JSR223 Test Elements and Bouncy Castle libraries.
For instance add JSR223 PostProcessor as a child of the request and add the relevant script to decode the response and check its status.
See How to Load Test OCSP with JMeter article for more details including example code snippets.