Glossary
Encryption
Encryption is like writing a secret message in a code that only you and your friend understand. Even if someone intercepts the message, it's just gibberish to them without the secret key. Modern encryption is so strong that even the world's most powerful computers can't crack it.
What is Encryption?
Encryption is the process of converting readable data (plaintext) into an unreadable format (ciphertext) using mathematical algorithms. Only someone with the correct decryption key can convert it back to readable form. Encryption protects data both in transit (moving across networks) and at rest (stored on devices).
Why Should You Care?
Encryption is often legally required for protecting sensitive data. Many regulations (HIPAA, PCI DSS, state breach laws) mandate encryption for certain types of information. Beyond compliance, encryption means that even if your laptop is stolen or your database is breached, the data is useless to the thieves without the decryption key.
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Real-World Example
An accounting firm's laptop was stolen from an employee's car. It contained tax returns for 3,000 clients. Because the firm had enabled full-disk encryption, the thieves couldn't access any data. No breach notification was required, no clients were harmed, and the firm's reputation was protected - all because of a free feature they'd turned on.
How to Protect Against Encryption
- 1.
Enable full-disk encryption on all laptops
BitLocker (Windows) or FileVault (Mac)
- 2.
Ensure your website uses HTTPS (SSL/TLS)
- 3.
Use encrypted email for sensitive communications
- 4.
Encrypt sensitive files before uploading to cloud storage
- 5.
Verify your cloud services encrypt data at rest
- 6.
Use a VPN when working on public WiFi
Related Terms
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