yngSDA (Steam Desktop Authenticator)

A modern, lightweight, and secure desktop authenticator for Steam.

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📥 Download & Install

Unlike older authenticators, yngSDA is completely standalone. You do NOT need to install any .NET frameworks or extra software.

1. Go to the Releases Page.
2. Download the latest yngSDA_vX.X-beta.zip file.
3. Extract it to a safe and permanent folder on your PC.
4. Run yngSDA.exe.

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⚠️ CRITICAL WARNINGS (READ BEFORE USE)

🛑 BACKUP YOUR maFiles AND R-CODE If you lose your maFiles folder or forget your PIN, AND you didn't save your Revocation Code (R-Code), you will lose access to your Steam account. Always make backups of your maFiles folder and write down the R-Code (e.g., R12345) somewhere offline.

🛑 ACCOUNT SECURITY Using a desktop authenticator inherently bypasses the physical separation of 2FA. If your PC is infected with malware, attackers can steal your maFiles and your Steam items. Use this application at your own risk. We highly recommend using a strong PIN inside the app.

🛑 BEWARE OF SCAMS Never download yngSDA from YouTube links, Discord, or unknown websites. The ONLY official and safe source is this GitHub repository.

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✨ Features

• Modern UI: Clean, responsive, and easy to navigate.
• Account Import: Seamlessly drop your existing .maFile backups into the maFiles folder to load them instantly.
• Trade & Market Confirmations: View, accept, or cancel your pending Steam confirmations directly from the app.
• AES-256 Security: Your local data is encrypted using industry-standard AES-256 encryption protected by your custom PIN.
• Portable: Runs out of the box with zero dependencies.

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⚙️ Setup Instructions

1. Launch the App: Open yngSDA.exe.
2. Set a PIN: On your first launch, you will be prompted to create a Master PIN. This encrypts your session and maFiles. Do not forget it!
3. Add an Account:
   • Import (Recommended): If you already have .maFile backups from the original SDA or other tools, place them in the newly created maFiles folder next to the .exe and restart the app.
   • Link New Account (BETA): Click the button to link a new Steam account via credentials and SMS. (Note: Due to recent strict Steam API limits, fresh account binding is currently in Beta and may occasionally be rejected by Steam).
4. Confirmations: Select your account and navigate to the Confirmations tab to manage your trades.

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🛠️ Troubleshooting

• Confirmations list is blank or failing to load:
  • Wait a few seconds and try refreshing.
  • If the issue persists, your session token may have expired. You may need to re-authenticate the account.
• "Steam rejected this phone number" / Status 2 Error:
  • This is a known Steam API rate-limit for new bindings. Try again later, use a different phone number, or use an existing .maFile.

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Disclaimer: This project is run by independent developers and is not affiliated with, endorsed by, or connected to Valve Corporation or Steam. The software is provided "as is" with no warranties.