From cf4c0e825e96051e28b5b50a166e47ba0bdded22 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Thu, 22 Jan 2026 00:27:26 +0800
Subject: [PATCH] feat: update readme

---
 README.md | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index b0ccdd6..24ee03e 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,26 @@
 # script-sign
 
-Script Sign crate
\ No newline at end of file
+Script Sign crate
+
+
+## Signature V1
+
+```text
+@SCRIPT-SIGNATURE-V1: <key-id>.<algorithm>.<time>.<signature-value-in-base64>
+```
+
+## Signature V2
+
+```text
+@SCRIPT-SIGNATURE-V2: <key-id>.[<algorithm>.<time>.<public-key>.<signature1-value-in-base64>].<algorithm>.<time>.<signature2-value-in-base64>
+```
+
+In V2 use new sub signature:
+```plain
+<algorithm>.<time>.<public-key>.<signature1-value-in-base64>
+```
+
+Notice:
+- `<signature1-value-in-base64>` is signed by `<key-id>`
+- `<signature2-value-in-base64>` is signed by `<public-key>`
+