diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,5 +1,64 @@
-# RED_CRYPTO
+# RED_CRYPTO ver 0.2.0
 
 ## Description
 
-Password manager for (almost) any QMK keyboards with AES256, Kuznechik (Russian GOST cipher), SHA256. 
+Password manager for (almost) any QMK keyboards. 
+Supports cryptographic algorithms:
+- [ ] AES256,
+- [x] Kuznechik (Russian GOST cipher),
+- [ ] SHA256. 
+
+## Installation
+
+1. Clone this repo to your keymap folder.
+
+2. Copy this string to *rules.mk*. Don't forget to insert your names. This is make rules for including all needed file to firmwire.
+
+```make
+include keyboards/<keyboard>/<path to your keymap folder>/red_crypto/red_crypto.mk 
+```
+
+3. Import library in *keymap.c*.
+
+```c
+#include "red_crypto/red_crypto.h"
+```
+
+4. Enable chosen algorithms. Now you can use only `Kuznechik`. 
+
+```c
+#define USE_KUZNECHIK_8
+```
+
+5. Encrypt your passwords with chosen algorithm (AES, Kuznechik). Now available only Kuznechik. You can use `CyberChef`. Don't use web version! We are here for security, right? Choose `GOST Cipher`, then choose type `Kuznechik 34.12-2014`, not Magma. Choose mode ECB. Now, there is no CBC or CTR. 
+
+> Don't forget IV for GOST, get it from kuznechik_8bit.c.
+
+6. Add your encrypted passwords in "keymap.c". Now you can encrypt 2 passwords with length <=16 byte. Keep this information in secret. Even if there are no plaintext. 
+
+```c
+const uint8_t encrypted_passwords[2][16] = { {0,0,0,...,0,0,0}, {0,0,0,...,0,0,0} };
+```
+
+7. Add new layer or set new keyes everywhere you want.
+
+- `RED_TEST` - execute test functions of every algorithm with. Available only with `#define TEST_FUNCTIONS_ENABLED` and `COMMAND_ENABLE=yes`. You can see output via `hid_listen`.
+- `GET_PASS` - execute reading password for encrypted passwords. After entering password, tap this key again. Now, you can use `RED_PASSX` keys.
+- `RED_PASSX` - where `X` is number of your password in database. After tapping, keyboard send decrypted password.
+- `RED_RNG` - use 32 times function named `tap_random_base64` from QMK. It's for generating random strings. But now random seed is not unique for every keyboard's power on.  
+
+8. Copy this string to function *process_record_user* in *keymap.c* before all your code. It uses "switch case" construction inside. 
+
+```c
+    crypto_process_record_user(keycode,event,encrypted_passwords);
+```
+
+9. Flash your keyboard.
+
+
+## Usage
+
+Tap `GET_PASS`. Enter password. Tap `GET_PASS` again to confirm.
+Now you can use `RED_PASSX` to send decrypted passwords.
+
+If you have missed while entering password, just tap `GET_PASS` and tap `GET_PASS`.