Store client secret securely

Question

I know that a public client shouldn\'t use a client secret because, no matter how much you obfuscate it, it won\'t be protected from reverse engineering.

But, the

Answer 1

This article suggests these options, from less to more secure:

1. Store in cleartext

2. Store encrypted using a symmetric key

3. Using the Android Keystore

4. Store encrypted using asymmetric keys

Probably, using a combination of #4 and some way to univocally identify the device would be secure enough