There are several ways to retrieve developer accounts.

1. Answering the correct security question is the fastest way to unlock the security question.

2. Submit proof of materials, original packing box, three-guarantee certificate and invoice.

The developer account is the account used by the developer to debug the real machine, sign the certificate and upload the application to the AppStore. The main purpose of Apple's developer account is to develop applications, and ordinary accounts can only download applications. IReSign is now renamed as iModSign, and you can replace the certificate in the app with your own development certificate, so that pirated apps can be installed on machines that don't jailbreak (registered as development machines first).