chore: update docs

README.md

@@ -1,9 +1,36 @@
 # GoPass
 
-Simple password manager
+GoPass is a simple password manager for the command line.
 
 ## Installation
 
 ```bash
 go install -v github.com/vitalvas/gopass@latest
 ```
+
+## GoPass vs Pass
+
+GoPass is a simple password manager written in Go. It is inspired by [Pass](https://www.passwordstore.org/), but is not compatible with it for the storage layer.
+
+Cli commands are as compatible as possible (about 90%), to preserve user experience
+
+| Feature | GoPass | Pass |
+| --- | --- | --- |
+| Storage | Plugin backend | Encrypted files |
+| Encryption | ChaCha20-Poly1305 | GPG |
+| Encryption key | Yes | No |
+| Encryption value | Yes | Yes |
+| Password generation | Yes | Yes |
+| Writed in | Go | Shell |
+
+### Storage
+
+* `file` - stores data in a tree structure of keys. Each file is an independent key.
+
+## Security
+
+GoPass uses the ChaCha20-Poly1305 algorithm for encryption. The system represents itself as a key-value store.
+
+Encryption and decryption occurs on the cli side, which allows you to protect data during transmission and storage.
+
+The key and values are encrypted in a special way. The key is encrypted using a hash from the correct phrase. The values are encrypted using a hash of the key and passphrase combination, which reduces the ability for an attacker to track key movements.