How to Encrypt an Excel File

Encrypting Within Excel

To secure an Excel file, use the built-in encryption feature. Encrypt by setting a password within Excel, which applies AES, 256-bit key length, SHA1, and CBC encryption standards. Select the 'File' tab, choose 'Info', click on 'Protect Workbook', and then 'Encrypt with Password'. Enter a case-sensitive password. Always remember your password to avoid losing access to the file.

Using Cloud Storage with End-to-End Encryption

For added security, store Excel files in the cloud with services like Proton Drive that offer end-to-end encryption. Upload your Excel file directly to Proton Drive to encrypt it without needing a separate password for the file itself.

Password Management

Manage your encryption passwords with Proton Pass, an open-source, independently audited password manager. It helps create and store strong passwords essential for the encryption of Excel files, particularly under GDPR or HIPAA law.

Common Use Cases

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  Use case 1: Protecting sensitive financial data from unauthorized access
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  Use case 2: Ensuring confidentiality of personal employee information in HR documents
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  Use case 3: Securing intellectual property contained within research and development spreadsheets
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  Use case 4: Complying with industry regulations on data protection for client information
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  Use case 5: Safeguarding strategic business plans shared via email with stakeholders

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