📖 Description
1. Key Differences Between Keccak and SHA-3
Although SHA-3 is based on the Keccak algorithm, they are not entirely equivalent, which is crucial in technical development:
- Ethereum Standard: Ethereum adopted the original Keccak specification during its early development. If you use the
keccak256() function in Solidity, the generated hash must use this tool's Keccak-256 mode, not the standard SHA-3.
- Different Padding Schemes: Standard SHA-3 (NIST FIPS 202) adds extra bits to the end of the input, resulting in a completely different hash value for the same text compared to Keccak.
- Attack Resistance: Keccak employs a Sponge Construction, offering extremely strong collision resistance, making it one of the most secure and efficient hash algorithms currently recognized.
2. Core Features Explained
This site's tool provides an industrial-grade Keccak calculation experience:
A. Full Range of Output Lengths
Supports all mainstream bit lengths of the Keccak family:
- Keccak-224
- Keccak-256 (Standard for Ethereum and mainstream blockchains)
- Keccak-384
- Keccak-512
B. Flexible Data Format Input
- String Mode: Supports plain text input with UTF-8 encoding.
- Hexadecimal Mode (Hex): Supports processing raw byte streams (e.g.,
0x1234...), which is crucial for debugging bytes data in smart contracts.
C. Privacy Protection (Local Computation)
- Absolute Security: The hash calculation process is performed entirely in your browser's frontend.
- Zero Upload: Your sensitive data (e.g., public key information derived from private keys, unpublished contract source code) is never uploaded to the server, offering security equivalent to an offline environment.
3. Application Scenarios Reference
| Scenario |
Recommended Algorithm |
Example Application |
| Ethereum Development |
Keccak-256 |
Calculating function selectors, event signatures. |
| Cryptocurrency Addresses |
Keccak-256 |
Deriving Ethereum wallet addresses. |
| File Verification |
Keccak-512 |
Obtaining the highest security level file fingerprints. |
| Cryptography Experiments |
Keccak Full Series |
Comparing output differences between Keccak and SHA-3. |
4. Brief Operation Process
- Input Content: Enter the text or hexadecimal data you want to hash in the input box.
- Select Bit Length: Choose
256 (default recommended) or another bit length from the options.
- Real-time Result: The result box will immediately generate a 64-character (for Keccak-256) hexadecimal digest.
- Format Adjustment: Optionally choose to add a
0x prefix to the result for easy copying into code.
- One-Click Copy: Click the icon to quickly save the calculation result.
5. Why Choose This Site's Keccak Assistant?
- Blockchain-Friendly: Strictly adheres to Ethereum's underlying hash standard, preventing contract errors caused by SHA-3 padding differences.
- Ultra-Fast Response: Utilizes an optimized underlying JS algorithm library, ensuring smooth performance even with large data segments.
- Completely Free: No registration required, unlimited usage, an essential online auxiliary tool for Web3 developers.