Whether or not something is connected to the internet doesn't determine if it's open source or not. In the case of Tails, your USB drive is probably proprietary hardware, despite being able to flash open-source firmware onto it.
I do believe that the Trezor Model T is 100% open source, but its overall security is another thing. It's also worth pointing out that the computer connected to it by USB could be running open-source software, but it's probably not on open hardware. You might find this interesting.
https://www.ledger.com/blog/Unfixable-Key-Extraction-Attack-on-Trezor
crimsonleaf363
npub13q5…nrcq
2024-05-30 13:13:46
in reply to nevent1q…72h0
Author Public Key
npub13q560x4p3y5wljdc3pvsrphjgzptgkn629gf4jjdgz3qzdkknsaqmgnrcqPublished at
2024-05-30 13:13:46Event JSON
{
"id": "3fd4095975e0eb18854eb25806281b8a89d585483d1302039789b5d602256ac1",
"pubkey": "8829a79aa18928efc9b888590186f24082b45a7a51509aca4d40a20136d69c3a",
"created_at": 1717067626,
"kind": 1,
"tags": [
[
"p",
"4eb88310d6b4ed95c6d66a395b3d3cf559b85faec8f7691dafd405a92e055d6d"
],
[
"p",
"92785a96e335c275f0d406ca319f9818c8a9a24190a8a3e9354a1b5264eaf3a9"
],
[
"p",
"8829a79aa18928efc9b888590186f24082b45a7a51509aca4d40a20136d69c3a"
],
[
"e",
"674594d29dc82c83997cf8169b1ecf65f25b655bfd361b8983d841f84a0736ab",
"wss://relay.primal.net",
"root"
],
[
"e",
"1bac5949fc45c69e699ac839cde7a56b9cbdd33b6ed88e156b4a1fea542f31a5",
"wss://relay.nostr.bg",
"reply"
]
],
"content": "Whether or not something is connected to the internet doesn't determine if it's open source or not. In the case of Tails, your USB drive is probably proprietary hardware, despite being able to flash open-source firmware onto it. \n\nI do believe that the Trezor Model T is 100% open source, but its overall security is another thing. It's also worth pointing out that the computer connected to it by USB could be running open-source software, but it's probably not on open hardware. You might find this interesting.\n \nhttps://www.ledger.com/blog/Unfixable-Key-Extraction-Attack-on-Trezor",
"sig": "2d5954c78cc3ee82a4f516238f3a50134b92fce2768468d04ad90bb3df25634391cd5643541d3e6053dde73cc5b27632c92d29bd16dda111e8280e31ff5282bd"
}