Encryption
Encryption is the backbone of digital privacy. Start with the fundamentals, explore the differences between symmetric and asymmetric encryption, see how real-world protocols like E2EE and TLS work, and learn to protect your own data with encrypted backups.
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What "Encrypted" Really Means (and Why You Should Care)
Encryption is often mentioned in the context of security apps and websites, but many people don't fully understand what it means or why it matters.
What's the Difference Between All These "Encryptions"?
Not all encryption is the same. Understand symmetric vs. asymmetric encryption, and compare AES, RSA, ECC, and other common algorithms.
Encryption in Practice: How E2EE, TLS, and PGP Protect Your Data
Learn how hybrid encryption works in the real world, from end-to-end encrypted messaging to TLS-secured websites and PGP email.
Don't Forget Your Backups — But Encrypt Them First!
Backups are essential for protecting your data from hardware failure, theft, or ransomware — but if they're not encrypted, they can become a security risk.
Cloud Backup Encryption: Securing Your Data in the Cloud
Explore cloud encryption approaches, compare provider-managed vs. client-side encryption, and discover specialized backup solutions for maximum protection.
HTTPS and TLS: What Happens When You See the Padlock
Every time you see the padlock icon, a complex handshake is happening. Learn how TLS establishes secure connections and what the different versions mean.
End-to-End Encryption: Who Can Actually Read Your Messages
E2EE ensures only sender and recipient can read messages. Understand how it differs from transport encryption and why key management matters.
PGP and Email Encryption: A Practical Introduction
PGP has been protecting email for decades. Learn how public/private key pairs work, how to set up encrypted email, and PGP's limitations.
Full-Disk Encryption: Protecting Your Data at Rest
BitLocker, FileVault, and LUKS encrypt your entire drive. Learn how full-disk encryption works and when it does (and doesn't) protect you.
Encryption Key Management: The Hard Part Nobody Talks About
Encryption is only as strong as your key management. Learn about key generation, storage, rotation, and the common mistakes that undermine encryption.
The Quantum Threat to Encryption: What You Need to Know Now
Quantum computers could break RSA and ECC. Learn about the timeline, post-quantum cryptography standards, and what you should do today to prepare.
Tools
Encrypt & Decrypt
AES-256 encryption and decryption operating entirely in your browser. Protect sensitive text and data with military-grade encryption.
Random Number Generator
Cryptographically secure random numbers using the Web Crypto API. Essential for security applications requiring high-entropy randomness.
In-Depth Guides
AES-256 Encryption Guide
Technical deep dive into AES-256 round functions, PBKDF2 key derivation, CBC mode operation, cryptanalytic resistance, and NIST standards.
Random Number Generation Guide
CSPRNG mathematical foundations, entropy sources, rejection sampling, bias elimination, and why standard Math.random() is insufficient.