

The main issues I can see:
- lack of secure instant communication, like Signal
- missing secure wi-fi protocols
- no TLS >= 1.0 support
- expired root certificates
- backdoors, established digital forensic tools
- credentials stored in RAM
If somehow you can install an SSH v2 client, with 2FA login - will be somehow useful.
My fast research, a PSP with custom firmware, and PSPSSH SSH client (not sure if it supports current ciphers).
Rebel side
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