Hey, i’m not good at tanich tech stuff. But i need to decide. Which of these encryptions is the best? Which to use on file level and which on hidden volumes? It is worthy to use symetrii+asymetric or just pick one good for both levels?
Symmetric ciphers such as AES are usually the “goal” - they tend to be stronger in the sense that they achieve similar security to asymmetric ciphers with much smaller key sizes. If you need a symmetric cipher to be stronger, it usually isn’t a big deal to just make the key bigger. Asymmetric ciphers need larger keys to achieve a similar level of security, however, so “just make the key bigger” won’t always work. When communicating with someone else, it’s pretty common to use an asymmetric key agreement scheme to decide on a shared secret you can then use with a symmetric cipher.
For your purposes, you probably just want a symmetric cipher. More accurately, you don’t want to be worrying about such primitive details at all. If you don’t really know what you’re doing, I suggest you use existing recommendations.