Excel Protection vs Encryption
Understanding the critical difference between protection and encryption in Excel files
Quick Summary
Excel Protection
Prevents editing. Can be removed without password using KeylessFile.
Excel Encryption
Prevents opening. Cannot be removed without the original password.
Key Differences
| Protection | Encryption | |
|---|---|---|
| Security | Weak - Password stored in file, easily removable | Strong - AES-256 encryption, password required |
| Access | Can open and view file, limited editing | Cannot open file without password |
| Removal |
What KeylessFile Can and Cannot Do
KeylessFile CAN Remove:
- • Sheet protection from individual worksheets
- • Workbook structure protection
- • Password-protected sheets and workbooks
- • Protection from .xlsx, .xls, and .xlsm files
KeylessFile CANNOT Remove:
- • File encryption (password to open)
- • AES-encrypted Excel files
- • Password-protected files that require password to open
Security Implications: It's important to understand that sheet and workbook protection were never designed for strong security. They're meant to prevent accidental changes and maintain document structure, not to protect confidential information.