Génère SHA-3 (Keccak[c=2d])

Génère SHA-3 (Keccak[c=2d])


SHA-3, which stands for Secure Hash Algorithm 3, is a family of cryptographic hashing algorithms designed to securely and efficiently compute hash values of data. The SHA-3 algorithms were developed to replace SHA-2, which had previously been subject to some security concerns. In this guide, we will explain how to use a SHA-3 web application for hashing with various output lengths, including SHA-3-224, SHA-3-256, SHA-3-384, and SHA-3-512.

What is SHA-3 Hashing?

SHA-3 is a family of cryptographic hashing algorithms based on different principles compared to the previous SHA-1 and SHA-2 algorithms. It was developed to provide increased security and resistance against known cryptographic attacks. The SHA-3 algorithms produce hashes of different lengths, but all are known to be highly secure.

Enter Data to Hash

Once inside the web application, you should see a text area where you can enter the data you want to hash. This data can be of any type: text, strings, text files, or any other type of data.

Automatic Hashing

Unlike some hashing applications, this web application will perform hashing in real-time as you enter the data. There is no need to click a button to start the process. The application will automatically compute the SHA-3 hash at 224, 256, 384, or 512 bits as you type or enter the data.

Copy the Hash

Once you have entered the data and the hash has been computed, you can copy the resulting hash to your computer's clipboard. Simply select the hash with your mouse and use the Ctrl+C (or Cmd+C on Mac) key combination to copy it.

Using the Hash

SHA-3 hash can be used for a variety of purposes. Some common uses include:

Data Integrity Verification

You can use the hash to verify that a file downloaded from the network has not been altered during the download. Calculate the hash of the original file and compare it with the hash of the downloaded file. If the two hashes match, the file is intact.

Password Security

SHA-3 hashes are often used to protect passwords. When creating an online account or changing your password, the system can store a hash of your password instead of the actual password. This way, if the password database were to be compromised, attackers would not have access to the actual passwords.

Digital Signatures

SHA-3 hashes are used in creating digital signatures. A hash of the document or message is created and then encrypted with the sender's private key to create a digital signature. The recipient can then use the sender's public key to verify the authenticity of the signature.

Limitations and Security

Although SHA-3 is considered very secure, it is important to note that no algorithm is completely immune to cryptographic attacks. Therefore, it is always advisable to use best security practices, such as using hashing algorithms in combination with other security techniques like password "salting," to enhance overall security.


In this guide, you have learned what SHA-3 hashing is and how to use a web application to perform it. SHA-3 algorithms are known for their security and are widely used in various contexts, from data integrity verification to password security and digital signatures. Make sure to use hashes securely and responsibly in your projects to ensure the security and integrity of your data.