From 7fabcf2f28b9d1fe6fe10c11968cb409558d708c Mon Sep 17 00:00:00 2001
From: SKYJAMES777 <3886190@qq.com>
Date: Thu, 25 Jun 2026 18:51:02 +0800
Subject: [PATCH] fix #7

---
 security/biometric-note-locking-tech-spec.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 security/biometric-note-locking-tech-spec.md

diff --git a/security/biometric-note-locking-tech-spec.md b/security/biometric-note-locking-tech-spec.md
new file mode 100644
index 00000000..865c6b12
--- /dev/null
+++ b/security/biometric-note-locking-tech-spec.md
@@ -0,0 +1,14 @@
+# Note Locking with Biometrics/PIN - Technical Specification
+
+## Implementation Plan
+1. Use OS-level biometric APIs (Windows Hello, macOS TouchID, Android Biometric)
+2. PIN fallback with secure local storage
+3. AES-256 encryption for note content
+4. React Native or Flutter for cross-platform
+
+## Security Considerations
+- Keys stored in OS keychain/keystore
+- Rate limiting on PIN attempts
+- Auto-lock after inactivity
+
+## Estimated Effort: 2-3 weeks