Why is Bcrypt one of the safest password storage options available?
In the area of cybersecurity, protection after password leaks is the last line of defence. Early developers prefer MD5 or SHA-1 This fast Hash algorithm. However, MD5 is growing with the explosion of hardware performance. The speed of detachment has reached hundreds of millions per second, making violent detachment and rainbow-watch attacks extremely cheap.
Self-adaptability: Bcrypt 's core weapon
Bcrypt and traditional Hashi are the biggest differences between it and it. Calculating Costs (Work Factor / Cost) 。 It is based on the Blowfish encryption algorithm and introduces a Costa factor that can be added with hardware performance. Every increase 1 The time required for calculation is doubled.
- Prevention of violence to decipher: Even if the assailant has high performance GPU cluster, Bcrypt It can also take hundreds of milliseconds to break a password through mandatory delays, making large-scale cracking unfeasible.
- Inline salt (Built-in Salt): Bcrypt Automatically generates the only random salt value for each Hash and contains it in the generated Hash string. This means that even if two users use the same password, their Hash values are completely different.
How can the common problem of “Hashi certification failure” be addressed?
In the development process, developers often encounter "the correct password but not the ability to pass Bcrypt" Check. This is usually caused by:
- Coding issues: Ensure that the specified password is used for a uniform UTF-8 code before entering the Bcrypt library.
- Length limit: Bcrypt has a 72-72 algorithm itself. bytes limit. The sections beyond this length will be cut off. If you need to process the super-long password, you should start with the password. SHA-256 Hash, proceed with Bcrypt.
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Algorithm version:
Bcrypt usually produces Hashes as
$2a$、$2b$or$2y$Start. Although they are functionally basic equivalents, certain specific libraries may require prefixes.
Best practice of Cost Im
Choose Cost-in-a-kind The trade-off between safety and performance 。 An ideal Cost factor should allow a single validation to take about 100 ms to 250 ms on your server. Between. The industry currently recommends a default value of 10 or 11. If your application is subject to extremely high security requirements, you can consider upgrading to 12 Over.
Use our online tool to adjust Cost in real time The factor and the resulting Hashi structure are observed. All calculations are done locally in your browser, and we will not record or upload any password information about you to ensure that your privacy is absolutely safe.