encrypting seed phrase with a password

[satscraper]

It is turned out that  a strong passphrase added to SEED phrase makes harder to perform Dark Skippy attack which needs substantially increased signatures to be successful. Thus the strong  passphrase along SEED can't hurt OP.

 Feel free to reap the benefits from reading the  content of this  topic on Dark Skippy attack

[ABCbits]

You should use GPG or openssl

Interesting. Recently I had a conversation with a guy who made a software for offline text encryption, and he said that openssl is less secure if it utilizes cdn libraries.

CDN as in Content Delivery Network? If that's the case, just use OpenSSL which installed directly on your computer, rather than on browser.

And also some people say that libessl is more secure that openssl.

I think it's hard to know which one is more secure. LibreSSL remove many unused code and support for older stuff, which means potentially less security issue. But it's less popular than OpenSSL, which means less people pay attention to it's code and security. It reminds of discussion which compare Linux and BSD security,