Here is a simplified diagram illustrating the encryption and decryption process used by MEGA:

To summarize the single most important takeaway: Every file or folder has its own unique key, which is nothing more than the random string after the # in a full share link.

To appreciate why "decryption key for MEGA" is a specific concept, compare it to other platforms:

This is a 22-character secure code derived from your password. Because MEGA does not store your password, this recovery key is the only way to regain access to your account if you forget your password. How to Find Your MEGA Decryption Key

The beauty of MEGA’s system is that even MEGA itself cannot spy on your files. The price of that privacy is that the decryption key is entirely your responsibility. Treat it with care, never trust a "key hacker," and you’ll use MEGA safely and effectively.

To ensure secure access to encrypted data on MEGA, users should follow best practices for managing decryption keys:

A standard MEGA link looks like this: https://mega.nz/file/AbCdEfGh#1xY2z3A4b5C6d7E8f9G0h1I2j3K4l5M6n7O8p9Q0r

The location of a key depends on whether you are sharing a file or looking for your account recovery key. 1. Finding a Key for a Shared Link