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Understanding Bcrypt's Work Factor and Choosing the Right Value
- Bcrypt is a popular choice for password hashing, known for its unique features like automatic salt and adaptive hashing.
- The work factor in bcrypt controls the computational effort for hashing a password, affecting security and processing time.
- Adjusting the work factor is essential to keep passwords secure as hardware technology advances.
- Choosing the right work factor value in bcrypt is crucial to balance security and user experience.
- Increasing the work factor exponentially increases hashing time and brute-force resistance.
- It is recommended to adapt the work factor periodically to stay ahead of hardware advancements and ensure password security.
- Depending on the project type, work factor values for bcrypt can range from 10 for development to 14+ for high-security applications.
- Future-proofing password hashing involves adjusting the work factor over time as hardware improves, without interrupting user experience.
- Implementers should consider the context of their application and periodically monitor and adjust the work factor based on the evolving threat landscape.
- Key takeaways include doubling hashing time with each +1 in work factor, migrating periodically to adapt to hardware advancements, and customizing work factor based on the application's security needs.
- Tools like Auth0 blog, OWASP resources, and online CLI tools can aid in implementing and managing bcrypt for secure password hashing.
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