update README

README.md

@@ -1,24 +1,54 @@
-reproducible **SSH Keygen** by `Ed25519`
+reproducible **SSH Keygen** by `PBKDF2` + `Ed25519`
 
 
 
 
 
-## CLI
+## Methodology
+
+```
+|--PBKDF2--------|
+|                |
+|           salt <- 'the default salt'
+|     passphrase <- 'the default passphrase'
+|                |
+|  hash:  sha512 |
+| round: 400_000 |
+|----------------|
+↓
+↓
+↓
+|--Ed25519--------------|
+|                       |
+| npm:ed25519-keygen    |
+|     npm:@scure/base   |
+|     npm:@noble/hashes |
+|     npm:@noble/curves |
+|-----------------------|
+```
+
+
+
+
+
+## Deno CLI
 
 ### print fingerprint
 
-    deno run   jsr:@key/gen-ssh-ed25519           <salt> <passphrase>
+    deno run jsr:@key/gen-ssh-ed25519 \
+             <salt> <passphrase>
 
 ### create public key
 
-    deno run   jsr:@key/gen-ssh-ed25519/pub       <salt> <passphrase>
+    deno run jsr:@key/gen-ssh-ed25519/pub \
+             <salt> <passphrase>
 
 ### create private key
 
-    deno run   jsr:@key/gen-ssh-ed25519/private   <salt> <passphrase>
+    deno run jsr:@key/gen-ssh-ed25519/private \
+             <salt> <passphrase>
 
-### create `uuid` via `crypto.randomUUID`
+### create **UUID** via `crypto.randomUUID`
 
-    deno run   jsr:@key/gen-ssh-ed25519/uuid
+    deno run jsr:@key/gen-ssh-ed25519/uuid