ESET What is the difference and security between "hashing" and "encryption"?

This article is a re-edited version of "What is the difference between hashing and encryption?" Published in the "Cyber ​​Security Information Bureau" provided by Canon Marketing Japan.

The difference between hashing and encryption is "irreversible"

Example of using hashing

1) Digital signature

2) Email

3) Files to distribute

4) Bitcoin, blockchain

Hashing standard

1) MD5

2) SHA-1

3) SHA-2

4) SHA-3

Mechanism of encrypted communication

1) Common key cryptosystem

2) Public key cryptography

-The client requests a connection to the server. -The server sends the server certificate including the public key, and the client verifies the server certificate. -The client encrypts the common key with the public key included in the server certificate. Then send to the server. -The server decrypts the common key using the private key. Then, data is sent and received using the common key.

Figure 1: Four steps for SSL connection

Hashed password security