Lets say i want to transact a very important huge amount of btc transation of my life. Which one should i chose between Offline transaction via Electrum(gpgverified) or trezor bought from official site.
This is a hypothetical question. i want some expert opinion to confirm my bias that offline transaction on airgaped pc is more secure than a trezor.
This is a hypothetical question. i want some expert opinion to confirm my bias that offline transaction on airgaped pc is more secure than a trezor.
In theory they are pretty much equal. In reality I also feel like they're not.
Air-gapped cold storage is safe because it's offline. But you have to be careful on how you transfer the tx to be signed by the cold storage and back to the live computer; also there are theoretical means to also hack into those too.
Hardware wallet should be secured by its Secure Elements chip (but afaik Trezor doesn't have one). If done well HW should be safe. If you updated with no buggy and official firmware/app you should be good.
All in all, HW has quite a number of "if" here and there and it's also plugged in "online" (it doesn't matter how often). This makes it also in my eyes less secure than a cold storage.
But I know how to do a cold storage. One who doesn't know how to make it properly and use it properly has a much higher chance to get his money stolen than with HW.
PS. OP, you should write better your post, as you can see the wording "offline transaction" can easily interpreted in the way you never broadcast the tx online.
