Hashing vs Encryption
- Encryption. Two-way function, reversible. We can go back and obtain the original text if we have the key. A secret key is required. Used to transfer data safely. Eg: RSA, AES
- Symmetric: same key is used for encrypting and decrypting.
- Asymmetric (aka public-key).
- Hashing. One-way function. We can't recover the original text. A key is not required. Used to verify data. Eg: MD5, SHA256, bcrypt, scrypt
https://eric.mann.blog/hashing-is-not-encryption - https://news.ycombinator.com/item?id=29855212