How to Encrypt a File for Secure Email Transmission
Learn how to protect your private documents by encrypting files using the simple ZIP format and a strong passphrase for safe email sharing.
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About this video
⚛️ Want to send a file safely by email? I’ll show you how to use the simple .zip format with a strong passphrase so your private documents stay protected across Windows, Mac, or Linux platforms.
⚛️ Encrypting a file
Encrypting a file is easy with 7-Zip. Put the file in a .zip archive and set a passphrase. The result works across Windows, Mac, and Linux. Share the file securely, but give that long-and-strong passphrase separately.
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✅ Watch next ▶ How End-to-End Encryption Protects Your Messages and Where It Fails ▶ https://youtu.be/Rx39XYgsrQQ
Chapters
0:00 How to Encrypt a File
0:47 Password-protecting a zip file encrypts its contents.
1:36 Look at 7ZIP
2:21 File format and password
2:38 Encryption method
3:30 Share the file
4:40 Decrypt the file
5:25 Zip on the command line
5:50 One Zip drawback
6:52 The weak linkS
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Published
Sep 26, 2025
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