MySQL Security – Random Password Generation

April 15, 2020

When thinking about security within a MySQL installation, you can consider a wide range of possible procedures / best practices and how they affect the security of your MySQL server and related applications.

MySQL provides many tools / features / plugins or components in order to protect your data including some advanced features like Transparent Data Encryption (TDE)Audit, Data Masking & De-Identification, Firewall, Password Expiration Policy, Password Reuse Policy, Password Verification-Required Policy, Failed-Login Tracking and Temporary Account Locking, Dual Password Support, Connection-Control Plugins, Password Validation Component, etc…

MySQL Security

Basic password policy practices teaches us :

  • Each user must have a password
  • A user’s password should be changed periodically

Indeed this is a good start !

What if MySQL make your life easier by helping you to create user with strong secure password?
Well it is now possible in MySQL 8.0 🙂



TL;DR

MySQL has the capability of generating random passwords for user accounts, as an alternative to requiring explicit administrator-specified literal passwords.




A DBA can use CREATE USER, ALTER USER or SET PASSWORD for generate random passwords for user accounts.

Let’s have a quick look using MySQL 8.0


Create a user account

To create a new MySQL user account with a random password use the statement CREATE USER with the clause IDENTIFIED BY RANDOM PASSWORD :


Modify a user account

To assign a new random password to a MySQL user account use the statement ALTER USER with the clause IDENTIFIED BY RANDOM PASSWORD :


Assign a password

Another way to assign a new random password to a MySQL user account is to use the statement SET PASSWORD with the clause TO RANDOM :


Please note that by default, generated random passwords have a length of 20 characters.
This length is controlled by the generated_random_password_length system variable, which has a range from 5 to 255.



To Go Further

Reference Manual



MySQL Security Serie (1st edition)



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4 Responses to “MySQL Security – Random Password Generation”

  1. […] like Transparent Data Encryption (TDE), Audit, Data Masking & De-Identification, Firewall, Random Password Generation, Password Reuse Policy, Password Verification-Required Policy, Failed-Login Tracking and Temporary […]

  2. […] like Transparent Data Encryption (TDE), Audit, Data Masking & De-Identification, Firewall, Random Password Generation, Password Expiration Policy, Password Verification-Required Policy, Failed-Login Tracking and […]

  3. […] like Transparent Data Encryption (TDE), Audit, Data Masking & De-Identification, Firewall, Random Password Generation, Password Expiration Policy, Password Reuse Policy, Password Verification-Required Policy, Dual […]

  4. […] like Transparent Data Encryption (TDE), Audit, Data Masking & De-Identification, Firewall, Random Password Generation, Password Expiration Policy, Password Reuse Policy, Failed-Login Tracking and Temporary Account […]

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