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So at some point in the future we will likely fork to some new quantum-resistant cryptography before quantum computers pose a serious risk. We don't need to make any decision regarding this for years or even decades, and indeed, making such decisions now would be a mistake given the entire field is in its infancy and any system we chose today would likely have been replaced by something else by the time it was actually relevant.
Every technology will follow the development of new technologies. Especially if quantum computers are really coming, then cryptography that is resistant to the threat of quantum computers will also be made.
As is currently the case with AI ChatGPT technology which is able to provide a lot of conveniences and also some negative impacts on the manual writing of an original forum user with AI writing or thinking, AI Approximation is presented so that it will inhibit all fraud that arises due to AI.
Quantum computers are not a threat if technological developments go hand in hand and they will be a great solution for future technological developments.
We are still in the early stages, that's very good.
Don't forget that in such a scenario then almost all the encryption currently used across the entire internet will similarly be broken, including everything to do with the fiat banking system.
Yes, it is undeniable, if quantum computers are present today and used commercially, nothing will be safe, all systems can be paralyzed easily, not just cryptography, but covering all security systems.
This life is an endless cycle of Problem -> Solution -> Problem -> Solution ∞
All will experience the cycle, but there will definitely be improvements to the solution that will be provided.
As with the type of seed phrase storage solution being discussed this time. There are various kinds of solutions and problems that arise.
But each solution has a different level.
A USB flash drive is not the worst method of a backup for your seed phrase, but i will still choose paper over it. USB flash drives have a lifespan, and even if it is not too short, it can become corrupted earlier on and you would lose data stored in it, which you can only recover most times with the help of a third party service, and that is not recommended because the data stored there is your seed phrase and it can be stolen by this third party.
All devices have the possibility of breaking down and that's a given, but it also depends on maintenance and how durable the device or USB flash drive is.
I found a few recommended USB Flash Drives that seem to have good initial security as well as resistance from extreme conditions.
Corsair Flash Survivor StealthIt seems to be a USB Flash Drive that is resistant to all conditions with a design that is specialized for extreme conditions.
The CNC-threaded Anodized Aluminum body is able to withstand 40Gs of shock and impact, and the rubber seal will make it survive underwater at a depth of 200m.
Apricorn Aegis Secure Key 3 NXA dual-security USB Flash Drive that uses a PIN-based locking feature right from the drive. It uses 256-bit, real-time AES XTS Encryption for all file types, meaning that as soon as you transfer anything to the onboard storage, it's already locked behind a wall of military-grade protection (FIPS 140-2 level 3).
See the reference here:
https://www.pcmag.com/picks/top-rated-usb-flash-drivesMake sure your USB flash drive is not connected to the internet regularly, and it must be encrypted and a strong password set up. Paper backup seems the best to me, but since you said you use 3 flash drives, i hope you have not kept all these backups in one location, if you have done so, you should consider separating it in different locations.
Don't make paper your best backup, upgrade to
aluminum Stainless Stell plate material which is safer in all conditions and will not be damaged or faded.
It will be better and recommended.