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Victor Isaac Oshimua
Victor Isaac Oshimua

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Password strength detector with machine learning

Most organisations employ rule-based systems to assess the strength of user passwords. However, these rules vary widely across different organisations. For instance, what is considered a strong password on Spotify may be considered weak on Netflix. This variability poses security challenges because the strength of a password determines how effective it is against attacks like brute force attacks, account takeovers, credential stuffing,dictionary attacks, cracking, and much more.

Machine learning (ML) is a potential solution to this problem. A ML algorithm can learn from a vast dataset of passwords to determine whether a new password is weak or strong, making it a universally applicable solution for any organisation.

Challenges with Rule-Based Systems

Rule-based systems are built on predefined rules and vary among organisations. For instance, a rule-based system can have rules such as:

  • If a password doesn't contain a capital letter, then it's weak.
  • If a password's length is less than 8 characters, then it's weak.
  • If a password has symbols and uppercase letters, then it's strong.

The list goes on with numerous defined rules.
However, rule-based systems for password strength assessment have limitations. They lack adaptability and require constant updates to keep up with evolving security threats. Furthermore, they often fail to provide accurate assessments of password strength in real-world scenarios.

The Machine Learning Solution

Machine learning is all about learning patterns from data. This solution involves harnessing the capabilities of machine learning to evaluate password strength. Here, a machine learning algorithm would be trained on a diverse dataset of passwords, enabling it to identify patterns and characteristics associated with weak and strong passwords.

Benefits of using machine learning:

Universality: Machine learning algorithm can be seamlessly integrated into any organisation's security infrastructure, irrespective of their specific password policies.

Adaptability: Machine learning can adapt to emerging security threats without manual rule updates, ensuring up-to-date protection.

Accuracy: Machine learning can provide more accurate assessments of password strength, enhancing overall security.

Implementation and Integration

Organisations can integrate this algorithm into their existing security systems via API, standalone software, or integration into existing security software suites.


Machine learning-based password strength detector offers a versatile and accurate solution to a common security challenge. By considering the implementation of this algorithm, organisations can enhance their password security practices and better protect their systems against cyber threats.

Visit this GitHub repository, where you can see how this solution is implemented.

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