Help me understand something about nostr. Isn’t sharing my private key with various apps to connect to nostr a security risk?
Discussion
It definitely is.
How do you sign up to clients without giving them your private key?
There's no real way around it. If you want to test different clients I suggest generating multiple accounts to try them out.
Ultimately you're trusting the client with your nsec.
Some clients allow you to login with extensions like Alby. So you trust the one extension instead of sharing it with multiple clients.