update readme

README.md

@@ -129,3 +129,30 @@ ALTER TABLE keys
     ADD COLUMN comment TEXT;
 ```
 
+## How Local-Mini-KMS init
+
+```text
+                  ┌──────────────────────────┐
+                  │  Local Mini KMS          │
+          Decrypt │  ┌─────────────────────┐ │
+┌──────┐ ┌────────┤► │ Master Key          │ │
+│ App  │ ◄────────┼┘ └─────────────────────┘ │
+└──────┘          │  1. Generate temp keypair│
+                  │  Temp Private Key        │6. Decrypt encrypted master key by Private key
+                  │  Temp Public Key         │7. Clear Private Key and Public Key
+                  │  │                  ▲    │
+                  └──┼──────────────────┬────┘
+                     │                  │
+                     │2.Get Public Key  │5. Write Public Key encrypted master key
+                     │                  │
+                     ▼                  │
+
+                   3. Decrypt encrypted master key by YubiKey
+                   4. Encrypt master key by Public Key
+                   ┌┬──────────────┐
+                  ┌┼│ YubiKey      │
+                  └┼│              │
+                   └┴──────────────┘
+```
+
+