Ich bin neu in der Krypto-Branche. Irgendwelche Expertenmeinungen zu diesem Shamir-Backup-Setup?

This means that all your shares will exist on the same PC at the same time, before you encrypt and upload (and hopefuly securely erase) to each service.

The seeds will also exist at the same time on the same PC when one day you need to recover.

Realistically speaking, it’s extremely unlikely that a Shamir stealing malware exists today — not enough people use Shamir, much less by putting it on a PC, so it’s not worth implementing. It’s difficult to say if the situation will be the same 10 years in the future though.

You _could_ be careful and, e.g., access each service from a different dedicated PC on a different network, and only put the seeds together in the Trezor itself. It’s starting to sound like a lot of work, which might be better spent ensuring your seeds are well stored in the physical world.

Security issues aside…

This sounds like you would also adding a bunch of fragility to your backups, as you could easily end up in a situation where you used a single 2fa for all of them, forget encryption keys, etc.

A big part of the power of slip39 is that it allows you to distribute physical backups for redundancy without sacrificing security (And gives you lots of flexibility) or introducing a high amount of complexity.

I would also look into Gnosis Safe. It’s free and useful for moving your funds to a multi-sig. For example 2 out of 3 people/addresses can execute transactions such as withdraws. That way if one key gets lost, a person dies, or the private key gets in the wrong hands, your funds are still ok. And it has built in support for a lot of farming/pool stuff:

[https://gnosis-safe.io/](https://gnosis-safe.io/)

In this case the whole security of your backup setup depends on proper security, storage and distribution of credentials and 2fa apps/keys. Those credentials should not be in one place: head, password manager, paper. And should be properly duplicated to prevent loss, and properly hidden to prevent theft. Best way to satisfy both needs is to use shamir secret sharing. imo this setup adds additional complexity, and introduces unnecessary risks.