Too late. OP is now noted as a google plant. I’ll stick to more reliable source like the other people on this sub

Yubico keys. Never had an issue after years of dangling on my keychain. They get replaced with upgrades to the key before they can break.

Using a VPN makes the original question redundant. The VPN would have everything super encrypted for either home wifi or home 4g/5g. Your question transforms into “can i trust this vpn company”

Decrypting the 4g/5g network will require a key from the telecommunications company. I argue it’s insignificantly less secure because a malicious actor can intercept it and decrypt it if they manage to steal the key from the company.

Practically, only your government would be able to get a copy of the key. But they’d also be able to watch your actual cable internet as well. And when your government gets interested in you then you fucked all the way up.

Honestly, pedos & terrorists get the whole world cooperation on doxing them. So if they’re not using a tool or method then it’s not proof against nation states.

Why the need for complete anonymity though? Literally only pedos operate at that level so that nobody can squeal on the others if they are busted (they inevitably need to mess up a real kid because their CSAM isn’t good enough).

SimpleX is currently the best one possible.

All the security of signal without needing a phone number.

Everything can be through tor. Contact link can be formed with a one time use code that you DM someone privately.

Anything more advanced and you’re basically in internet dead drop territory. An encoded message on a pastebin through tor. Congratulations, you’ve entered pedophile/terrorist level security realm.

sorry to ruin your day but some privacy nuts did pro-bono work for reddit in setting up a reddit onion address. https://old.reddittorjg6rue252oqsxryoxengawnmo46qy4kyii5wtqnwfj4ooad.onion/

Definitely no tracking through 6 hops.

Theoretically - It doesn’t matter. They flag all your data with a “user asked for it to be deleted” flag. It’s still data that their statisticians can play with. If it was public then internet archive grabbed a screenshot.

Practically - Deleting it is almost always sufficient. They probably take a month to get rid of it. Nobody want’s to explain to a future compliance officer why data is just sitting around waiting to be subpoenaed in a privacy lawsuit. If it’s fake deleted then it’s probably pseudo anonymized for internal research. Almost all search engines will forget the data existed over time.

Not so fast sailor! Do this first

✔️ Recommended: Use Firefox + uBlock Origin.
    Firefox is the top non-Chromium browser, offering nice security and privacy features. It also boasts the best compatibility with uBlock Origin for effectively blocking ads and other harmful web content.
✔️ Recommended: Change your DNS settings.
    DNS can enhance the browsing experience by increasing speed and bypassing restrictions, as your Internet Service Provider (ISP) usually offers a slower default DNS that may censor websites according to their preferences.
🧲 For torrenting: Install a reputable torrent client such as qBittorrent.
    Torrent client is a separate program that is essential for downloading files via torrent files, which is a method distinct from direct downloads.
🧲 For torrenting: Set up a VPN network such as AirVPN or ProtonVPN.
    VPN enhances online privacy and security by encrypting the connection and masking the IP address, making it ideal for torrenting as it protects your identity, and allows access to restricted content.
🧲 For torrenting: Bind the torrent client to the VPN interface.
    Ensures torrenting only happen when the VPN is active, lowering the chances of a leak of the IP address to essentially zero.

https://whatbox.ca/ has been decent for me so far.

They have wiki guides for everything.