[Serenade] Cipher Chat Version 1.0

This Triple-Encrypted, Anonymous Messaging System that's attachable. It's designed for secure, encrypted, anonymous 1-on-1 textbox conversations with a strong emphasis on privacy, security, and anti-eavesdropping measures. All chats are erased when the session ends to maintain maximum security.

NOTE: THIS LOCK CAN ONLY BE USED IF THE OTHER PERSON ALSO HAS A LOCK FOR AIR-TIGHT COMMUNICATION.
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Core Features
Security & Privacy:

• Encrypted Handshake: Confirms both locks are present, ready, and available before communication begins.
• Initiate: Once confirmed, both locks independently generate the same unique secret key using session data. The key is never sent, preventing interception.
• Randomized Channel: After successful initiation and security checks, a private, randomly generated channel is created for the conversation.
• Triple-Layer Encryption: Messages are protected using three layers of XOR Cipher with SHA256-derived with built-in message authentication to prevent tampering.
• Anonymous: Usernames are hidden; All messages appear simply as “Partner.”
• Session-Based: Each conversation lasts up to one hour, then automatically ends with a secure data wipe.
• Anti-Eavesdropping: Every session uses a unique private channel derived from session data, making listening in extremely difficult.
• Anti-Replay Protection: Messages are bound to the active session and timestamped to prevent reuse.
• Key Rotation: Encryption keys automatically rotate every five messages for added security.
• No Data Persistence: All messages and session data are permanently erased when a session ends or expires.

User Experience:
!!! Requirement: Both participants MUST have their own Lock to communicate, preventing eavesdropping.
• Own Lock Usage: Messages can only be sent by interacting with your own Lock. You cannot send messages using your partner's Lock.
• Region Limitation: Communication only works when both users are in the same region. If either user leaves the region, the session continues, but won't communicate UNLESS both sim-hop together to continue.
• Visual Feedback: Green outward particle bursts indicate sent messages, while red inward bursts indicate received messages, along with floating text notifications.
• Session Management: Users can accept or decline session requests, view limited message history during active sessions, and manually end sessions.
• Physical Lock Prim: A movable lock prim visually shows session status: locked means an active session, unlocked means available.

For extreme privacy or power users who want or require air-tight, region-wide communication with individuals.

Disclaimer: This lock is for use only between consenting users. It's designed to protect users from screenshots and help enforce Second Life's ToS, which prohibits sharing or posting private conversations (chat/IM logs) in‑world or on SL forums without consent. This lock must not be used in any way that violates the ToS.
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v.1.0 - Released 25/12/2025
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