Encoding vs Encryption vs Hashing
Draw clear lines between these three concepts and understand when to use each one.
Three Different Operations
Encoding, encryption, and hashing are three fundamentally different operations that serve different purposes. They are often confused, but understanding the difference is essential for designing secure systems.
Encoding transforms data format without providing security. Encryption protects confidentiality. Hashing produces a fixed-length fingerprint for integrity verification.
Encoding: Format Transformation
Encoding converts data from one format to another for compatibility or transmission purposes. It is always reversible and requires no key. Anyone who knows the encoding scheme can decode the data.
Examples include Base64 (binary to ASCII), URL encoding (%20 for space), HTML entities (& for &), and hex encoding. The goal is compatibility, not security.
All lessons in this course
- Base64 Encoding: How It Works
- ASCII, Unicode, and Text Representation
- Hexadecimal in Cryptographic Output
- Encoding vs Encryption vs Hashing