Absolutely best idea is to make an encrypted PDA & play forensic scientist by recording everything.
1. Get a Google Pixel 9, 9 Pro, or 9 Pro XL smartphone (Cellebrite-proofn at time of writing).
2. Verify images & GOS.
3. Disable biometrics & wireless connections.
4. Memorize with Anki or your own head a new, NIST-compliant passphrase with ≥ 8+ words.
3. Get a cover for the smartphone.
4. Buy EMI tape and electrically insulating waterproof tape.
5. Tape the insides of the cover with EMI, layering it & govering the inner walls as well, no gaps (overlay two adjacent layer always, say ≥ 1 cm, if possible)
6. Add one layer of the other tape to insides of the cover
7. Story inside your underpants 24/7 powered off when you don't use it.
My setup is more secure than not having phone, a Qubes laptop, a 2G burner, or not having phone.
1. Get a Google Pixel 9, 9 Pro, or 9 Pro XL smartphone (Cellebrite-proofn at time of writing). 2. Verify images & GOS. 3. Disable biometrics & wireless connections. 4. Memorize with Anki or your own head a new, NIST-compliant passphrase with ≥ 8+ words. 3. Get a cover for the smartphone. 4. Buy EMI tape and electrically insulating waterproof tape. 5. Tape the insides of the cover with EMI, layering it & govering the inner walls as well, no gaps (overlay two adjacent layer always, say ≥ 1 cm, if possible) 6. Add one layer of the other tape to insides of the cover 7. Story inside your underpants 24/7 powered off when you don't use it.
My setup is more secure than not having phone, a Qubes laptop, a 2G burner, or not having phone.