chore: resolve CHANGELOG conflict during TOB-19 rebase

Updated CHANGELOG.md

chore: resolve CHANGELOG conflict during TOB-19 rebase

Author: Stephen-Thomson

CHANGELOG.md

@@ -5,7 +5,8 @@ All notable changes to this project will be documented in this file. The format
 ## Table of Contents
 
 - [Unreleased](#unreleased)
-- [1.9.22 - 2025-12-04](#1922---2025-12-04)
+- [1.9.22 - 2025-12-05](#1923---2025-12-05)
+- [1.9.22 - 2025-12-05](#1922---2025-12-04)
 - [1.9.21 - 2025-12-04](#1921---2025-12-04)
 - [1.9.20 - 2025-12-02](#1920---2025-12-02)
 - [1.9.19 - 2025-12-02](#1919---2025-12-02)
@@ -195,6 +196,21 @@ All notable changes to this project will be documented in this file. The format
 
 ---
 
+## [1.9.23] - 2025-12-05
+
+### Fixed
+- Gracefully handle encoding of the point at infinity (TOB-19).  
+  `Point.encode()` now returns the SEC1-compliant `0x00` encoding for
+  `Point(null, null)` instead of triggering an internal assertion due to
+  invalid reduction context.
+
+### Security
+- Addressed TOB-19: eliminated assertion failures caused by encoding elliptic
+  curve points with null coordinates. Ensures safe, standards-compliant
+  behavior for malformed or edge-case point objects.
+  
+---
+
 ### [1.9.22] - 2025-12-04
 
 ### Changed