Overview
SecRandom stands as a beacon at the intersection of fairness and randomness
A random selection tool for classrooms, teams, events, decision-making and more, ensuring every choice is fair and transparent.
Version Warning
The v3 version is currently in Alpha stage and should not be used in production. It may contain unknown bugs and is intended for user experience only. If you encounter issues, please report them on GitHub Issues!
System Compatibility Notice
Important Notice: Starting from version v1.3.1.5, SecRandom has stopped support for Windows 7 and 32-bit systems. We strongly recommend using Windows 10 or higher for continued features and stable updates. Windows 7 and x86 users can download and use version v1.3.1.5 here.
Cross-Platform Support
Starting from v3, SecRandom is rebuilt with C#/.NET and Avalonia, officially supporting Windows, Linux, macOS, and mobile platforms (Android/iOS).
Open Source License
SecRandom is open source under the GNU GPL-3.0 license. You are free to use, modify, and distribute this software, but modified versions must also be open source under the GPL-3.0 license.
Quick Start
What is it?
SecRandom is a fair random selection system for classrooms, teams, events, decision-making and other scenarios, using intelligent dynamic weight algorithms to ensure every member gets fair selection opportunities. SecRandom v3 is built with C#/.NET 10, using Avalonia + FluentAvalonia for cross-platform UI, and adopts Microsoft Fluent Design language, combining fairness, ease of use, and aesthetics.
Core Advantages
- Zero Learning Curve: Intuitive interface, easily complete random selection
- Multi-scenario Coverage: Full coverage of roll call/lottery, single/multiple/group/gender selection
- Algorithm Guarantee: Cryptographic-level random algorithm with intelligent dynamic weights ensuring fairness
- Verifiable Drawing: Draw process can be recorded, replayed, and notarized, with results auditable
- Privacy Protection: Local encrypted storage, data never exposed and protected from malicious tampering
- Modern Design: Win11 Fluent Design inspired, clean and elegant
Applicable Scenarios
- Classroom Roll Call: Randomly select members without subjective bias
- Random Grouping: Fairly assign group tasks, promoting team collaboration
- Question Lottery: Boost engagement
- Annual Meeting Lottery: Fairly distribute prizes, enhance event fun
- Team Grouping: Randomly form project teams, promote cross-department collaboration
- Welfare Distribution: Fairly distribute employee benefits, demonstrate corporate care
- Competition Selection: Randomly determine contestant appearance order
- Activity Organization: Random lottery, lucky audience selection
- Fair Opportunity Distribution: Any scenario requiring fair random selection
Core Features
Draw Modes
Roll Call Mode
- Supports drawing by list scope, group, gender, and quantity, fitting real-world scenarios
- Supports normal random, history-balanced, and repetition control
- Single/multiple selection with rich draw animations
Quick Draw Mode
- Quickly draw students through an independent floating window without switching windows
- Supports shortcut keys and customizable buttons
Lottery Mode
- Supports prize board and inventory drawing, with independent student and prize management
- Dual-mode drawing for prize pools and lists, suitable for event draws, display order, and incentives
Fairness & List Management
- Dynamically adjusts weights based on history count, draw interval, group, gender, etc., reducing repetition and distribution imbalance
- Uses stable internal identifiers to maintain history; student IDs, numbers, and names are display-only
- Supports multiple lists and prize pools with
.xlsx,.xls,.csvimport, mapping, and preview - Every draw round saves history for query and review
- Supports batch avatar setting for members/prizes
Auditable Draw Results
- Every draw automatically saves a proof record file (
.srproof.json) - Optional server participation to witness the draw process (formal notarization mode)
- Results can be re-checked through official channels
Data, Privacy & Security
- Settings, lists, and history can be imported, exported, backed up, and restored
- Backups can include lists, history, draw proofs, images, audio, etc., but never passwords or security credentials
- Supports password, TOTP, or USB drive protection for important operations
- Supports crash recovery with error display and automatic restart
Verification Boundaries
| Mode | What it can do | What it cannot prove |
|---|---|---|
| Offline proof | Replay a completed draw | Not a pre-draw server witness; cannot prove the local program or real-world list was not tampered with |
| Online witness | Protect the draw flow after server lock-in | Cannot prove the list is authentic, complete, or was not filtered before submission |
Technology Evolution
| Version | Tech Stack | Stage |
|---|---|---|
| v1 | Python + PyQt5 + qfluentwidgets | Initial desktop implementation |
| v2 | Python + PySide6 + qfluentwidgets | Qt stack evolution |
| v3 | C# + Avalonia + FluentAvalonia | .NET desktop rebuild, continuously developing draw, verification, and desktop integration capabilities |
Download & Updates
- GitHub Releases provides release packages and update notes for all versions
- Official Download Page provides the latest version entry
- Auto-update verifies the signed release manifest and artifact length/hash before deployment; refer to each release's packages and notes
Support & Community
Contributors
Changelog
4088d-on
Copyright
Copyright Ownership:SECTL
License under:CC BY-NC-SA 4.0