How to extract certificates and keys from Puma 6 devices

[bipin775]

You're right—things have definitely evolved since the SB5101 and CMNonVol days. Puma 6 modems are a different beast entirely, with updated security measures and architecture.
As for extracting certs and keys from a Puma 6 device, it’s considerably more difficult due to:

• Enforced secure boot
  
• Encrypted/non-readable flash
  
• Hardware-level protections
  

Unless you have access to the bootloader or JTAG/UART (and potentially a vulnerable firmware version), most attempts will be blocked. That said, some researchers have explored UART access combined with legacy firmware exploits, but details are scarce for good reason—many forums and communities now enforce strict rules regarding cable modem tampering due to its legal and ethical implications.
If your intention is purely educational and for DOCSIS 3.0 lab testing:

• Look into public DOCSIS simulation tools or virtual CMTS environments.
  
• Consider using open-source CM or emulation projects rather than relying on hardware extraction.
  

Also, be cautious about any private guides—ensure you’re operating within legal boundaries, especially with ISP-certified devices.
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