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This article is about what to do if SHA-1 has been compromised. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Google has implemented a collision attack on SHA-1 to create two files with different contents but the same hash value. In addition, some security companies also believe that SHA-1 may have some flaws.

But at present, the cost of SHA-1 collision attack is very high, which requires a lot of computing power. If the computing power of the service is used for the attack, it may cost hundreds of thousands of dollars.

Anyway, it's time to use a more complete SHA-256 as the encryption technology. To prevent rainbow table attacks, you can use salt technology, which is encrypted based on the original password and some other characters. Using SHA-256 (global salt+ independent salt+ password) for encryption is a more effective way. The independent salt is placed in the user information table of the database, and each user's independent salt is different and is a random number. The global salt is placed in the program to ensure that even if the database is stolen by a hacker, as long as the program is secure, the password cannot be cracked.

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