#bcrypt

Introduction

In an age where data breaches are alarmingly frequent, the importance of secure data encryption cannot be overstated. One of the most reliable and widely-used methods for protecting sensitive information is the bcrypt hash algorithm. This guide will delve into the benefits of using an Online Bcrypt Hash Generator, how to use it effectively, and the role it plays in creating a secure digital environment.

Why Choose Bcrypt Hash?

Bcrypt is a strong, slow password hashing algorithm specifically designed to protect against brute-force attacks. It uses a unique 'salt' to protect against rainbow table attacks, and a 'work factor' that can be increased as hardware gets faster. Compared to other popular encryption techniques like SHA-1 or MD5, bcrypt stands out due to its adaptive nature and robustness against hacking attempts.

The Power of Online Bcrypt Hash Generator

An Online Bcrypt Hash Generator leverages the strength of the bcrypt algorithm in an accessible, user-friendly format. It allows you to hash passwords right in your browser, without the need for complex programming or software installation.

How to Use Bcrypt Hash Generator Effectively

To use the Online Bcrypt Hash Generator, simply input the text you want to hash into the provided field, then click 'Generate'. The tool will create a unique bcrypt hash, which you can then store in your database instead of the actual password. When needed, you can compare the stored hash with a hashed version of the input to verify a match.

For added security, consider increasing the 'cost' or 'work factor'. This makes the hash more computationally intensive to generate and thus harder for hackers to crack.

Creating Strong and Secure Passwords

While bcrypt provides robust protection, it's still crucial to create strong, unique passwords. Combine uppercase and lowercase letters, numbers, and special characters. Avoid common words or phrases, personal information, or sequential patterns. The stronger your password, the more secure your hashed result will be.

Real-World Applications of Bcrypt Hash

The bcrypt hash algorithm is widely used in various industries. For instance, many web applications use bcrypt for securely storing user passwords. In the event of a data breach, the hashed passwords remain undecipherable, protecting users' sensitive information.

Conclusion

Some smart people, including allegedly two of the experts from the password hashing competition panel (the one that chose Argon2, thus giving it the recognition and adoption that it has today) have said that bcrypt is better than Argon2 if you're aiming at runtimes shorter than one second.

Personally I've had trouble actually tracking down this claim or the reasoning for it, and I don't feel like reaching out to the guy who made one of the tweets that people like to link for this claim. At least not yet.

There's also a lot of good arguments to be made about cache hardness as a special case of memory hardness, because the goal is giving different kinds of hardware even footing, and giving general-purpose hardware an advantage over dedicated cracking hardware. CPUs have small fast caches (but FPGAs and ASICs can be built that way too). GPUs are in a weird special case where they get much smaller memory per each of their many (very simplified) "cores".

Anyway, so what I'm saying is, maybe I'm wrong about Argon2id at those settings being better than bcrypt for the purpose of asymmetric password logins, especially when the clients are typically web browsers on users' phones and laptops. Maybe bcrypt would be better. Maybe something like Pufferfish2 would be better.

As I said when I first mentioned the Ristretto255, Argon2id, and Ed25519 combination, that's just what I would do right now, off the top of my head. I'm not an expert, I've just done a good faith effort, for some amount of time, to figure out what's good. Maybe someone can do better, or will brute force it with more time investment, or has other resources like greater willingness to reach out to the guy behind that tweet.

One great way to get help is to badly fail in public view, because then people will at least yell at you or talk about your failures in the third person.

Bcrypt password cracking extremely slow? Not if you are using hundreds of FPGAs! #bcrypt #crypt #fpga

Original text by ScatteredSecrets.com

Cracking classic hashes

Moore’s law is the observation that the number of transistors in a dense integrated circuit doubles about every two years. This roughly doubles computing power about every two years as well. Password hashing algorithms typically have a lifetime of many decades. This means that the level of protection of a given password hash…

— yan (@bcrypt) October 29, 2020

Bcrypt Step by Step - Learn waaay more than you ever wanted to about how passwords are stored #crypto #cryptography #security

Bcrypt is a key derivation function, which can be thought of as a slow hash function. Its purpose is to slowly convert a piece of input data to a fixed-size, deterministic, and unpredictable output. A common use-case is to convert a password into an n-bit cryptographic key, which can then be used for safe authentication.

Here at Qvault,we use Bcrypt in our security systems. Bcrypt is a very…

— yan (@bcrypt) February 19, 2020

GitHubに上げておきました。

少し荒削り（甘い？）ところがありますが、Web開発プロジェクトで自分が使おうと思っている雛形です。

ユーザ登録・認証機能があります。（メールアドレスとパスワードの組み合わせ）

パスワードは暗号化されて保存されます

ユーザIDはJson Web Tokenに変換されてセッションに保持されて、このTokenの有無でアクセス制御を行います

GoogleとGitHubのOAuth認証機能を利用してログインできます（今後他の認証プロバイダーを追加する予定です）

ユーザ情報はデータベースに保存されます

MongoDBとPostgreSQLに対応しています

Web ServerはExpress、ビューエンジンはSwigを使っています

拡張や修正を行ったらお知らせいただけると嬉しいですが、義務ではありませんのでご自由にお使いください。

いずれSpring…