Hashing vs Encryption
Hashing and encryption are both important concepts in computing and cybersecurity, but they solve different problems.
What Is Hashing?
Hashing converts input data into a fixed-length output using a hash function. A properly designed cryptographic hash function is intended to make it computationally difficult to recover the original input from the hash.
What Is Encryption?
Encryption transforms readable data into ciphertext so that authorized users can recover the original information using the appropriate key.
Key Differences
| Feature | Hashing | Encryption |
|---|---|---|
| Primary purpose | Data integrity and verification | Confidentiality |
| Designed to be reversible | No | Yes, with the appropriate key |
| Uses a key | Not normally | Yes |
| Common examples | SHA-256, SHA-512 | AES |
Where Is Hashing Used?
Hashing can be used for integrity checks, digital signatures, data identification, and securely storing passwords when appropriate password-hashing algorithms are used.
Where Is Encryption Used?
Encryption is used to protect sensitive information during storage and transmission.
Conclusion
Hashing and encryption are not interchangeable. Hashing is primarily used for verification and integrity, while encryption is designed to protect information from unauthorized reading.