SHAKE-128 Generator
Generate variable-length cryptographic hashes with SHAKE-128 and SHAKE-256, the extendable-output functions (XOF) from the SHA-3 family.
SHAKE-128 output will appear here...What is SHAKE?
SHAKE (Secure Hash Algorithm KECCAK) is an Extendable-Output Function (XOF) from the SHA-3 family. Unlike traditional hash functions that produce fixed-length output, SHAKE can generate output of any desired length. This makes it incredibly flexible for applications requiring variable-length hash values, key derivation, or random number generation.
Understanding SHAKE (Extendable-Output Functions)
SHAKE (Secure Hash Algorithm KECCAK) represents a new paradigm in cryptographic hashing: Extendable-Output Functions (XOFs). Unlike traditional hash functions that produce fixed-length outputs, SHAKE can generate hash values of any desired length while maintaining the same security level. This flexibility makes it invaluable for modern cryptographic applications.
The Sponge Construction
SHAKE is built on the same Keccak sponge construction as SHA-3. The sponge works in two phases: absorbing input data into the state, and then squeezing out output of arbitrary length. This elegant design allows SHAKE to function as both a hash function and a stream cipher, making it incredibly versatile.
SHAKE Variants
| Function | Security Level | Output Length | Best For |
|---|---|---|---|
| SHAKE-128 | 128-bit security | Any length (≤ 2^128 bits recommended) | General purpose, KDFs, random oracles |
| SHAKE-256 | 256-bit security | Any length (≤ 2^256 bits recommended) | High-security applications, post-quantum crypto |
Key Applications
Cryptography:
- Key Derivation Functions (KDFs)
- Mask Generation Functions (MGFs)
- Random number generation
- Digital signatures (e.g., Ed25519ctx)
Protocols & Standards:
- Post-quantum cryptography
- NIST SP 800-185 (SHA-3 derived functions)
- cSHAKE (customizable SHAKE)
- KMAC (Keccak Message Authentication Code)
Quick Features
- SHAKE-128 & SHAKE-256
- Custom output length
- Text & File Input
- 3 Output Formats
- Download as File
- 100% Client-side
Why Choose SHAKE?
SHAKE represents the next generation of cryptographic hashing. Its ability to produce arbitrary-length output eliminates the need for multiple hash functions or complex constructions when you need non-standard hash sizes. It"s perfect for modern protocols that require variable-length outputs, such as key derivation, where you might need exactly 257 bits of key material. The security level remains consistent regardless of output length, and it"s standardized by NIST for government and commercial use.
Practical Applications of SHAKE
Key Derivation
Generate cryptographic keys of exact lengths needed for different algorithms. Need a 257-bit key for a custom cipher? SHAKE can produce it directly without truncation or padding.
Random Number Generation
Use SHAKE as a deterministic random bit generator (DRBG). Given a seed, it can produce an unlimited stream of cryptographically secure pseudorandom bits.
Post-Quantum Cryptography
Many post-quantum cryptographic algorithms rely on SHAKE for their security. Its flexibility makes it ideal for lattice-based and multivariate cryptography.
Frequently Asked Questions About SHAKE
All SHAKE hash generation is performed client-side in your browser using cryptographic algorithms. Your text and files never leave your device. No data is stored or transmitted to any server.
