SHA3-384 Hash Generator — Post-Quantum Keccak Hash Online
A high-security Keccak sponge variant producing 384-bit hashes. Suitable as a post-quantum alternative to SHA-384 for forward-looking applications.
Features
- ✓Compute SHA3-384 hashes online — Keccak sponge 384-bit output for post-quantum readiness
- ✓Real-time 384-bit hash computation with 96 hex character output
- ✓One-click copy, save as .txt, and uppercase/lowercase toggle
- ✓Provides 192-bit security — stronger than SHA-256 against quantum attacks
- ✓Hash verification against known SHA3-384 checksums
- ✓100% browser-based — all hashing done locally
- ✓Hash comparison tool — paste an expected 96-character SHA3-384 hash alongside new output for instant verification
- ✓Real-time input length counter — displays character and byte counts alongside the hash for reference
- ✓Cross-platform browser access — compute SHA3-384 hashes on any device without crypto libraries
- ✓Session history — retains previous SHA3-384 results during the session for easy reference
How to Use
- 1Type or paste your text into the input box above.
- 2Your hash digest appears instantly — no page reload needed.
- 3Toggle UPPERCASE / lowercase to change the hex output format.
- 4Click the copy icon to copy the hash to clipboard, or use Save to save as .txt.
- 5Paste an expected hash into the Verify field to check for a match.
- 6How to compare SHA3-384 with SHA-384 output: input the same text in both tools. Despite the same 96-character output size, the Keccak sponge produces different results from SHA-384's Merkle-Damgard structure.
- 7How to use SHA3-384 for post-quantum readiness: with 192-bit security, SHA3-384 provides meaningful resistance against Grover's algorithm. Use for new systems that need to remain secure into the quantum computing era.
- 8How to verify high-assurance digital signatures: when using Ed448 or similar high-security signing schemes, hash the message with SHA3-384 before signing to match the 192-bit security level.
- 9How to generate SHA3-384 for government classified systems: for systems requiring FIPS 202 compliance at elevated security levels, compute SHA3-384 of documents and configuration files for integrity verification.
- 10How to choose between SHA3-384 and SHA3-512: use SHA3-384 when 192-bit security is sufficient and 96-character output is preferred. Use SHA3-512 for maximum 256-bit security.
Frequently Asked Questions
What is SHA3-384?
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SHA3-384 is a high-security SHA-3 member producing 384-bit hashes via Keccak sponge with 192-bit collision security — suitable for quantum-resistant applications.
Why SHA3-384 over SHA3-256?
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192-bit vs 128-bit security margin at the cost of larger output. For long-term hash storage or quantum resistance, the extra bits provide meaningful protection.
Is SHA3-384 quantum-safe?
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No hash is truly quantum-safe, but SHA3-384 offers stronger resistance. Grover's algorithm would reduce it to 192 bits, still well beyond brute-force feasibility.
Where is SHA3-384 deployed?
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High-security government systems, long-term digital archives, and applications requiring NIST's highest SHA-3 security level for digital signatures.
SHA3-384 vs SHA-384 performance?
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SHA3-384 runs at roughly half SHA-384's speed on most CPUs due to Keccak's larger internal state. The security benefits often outweigh the performance difference for critical applications.
How many hex characters does SHA3-384 produce?
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SHA3-384 produces a 384-bit hash displayed as 96 hexadecimal characters — matching SHA-384's output size but with a completely different internal construction.
Is SHA3-384 suitable for long-term archiving?
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Yes. With 192-bit collision security, SHA3-384 provides a substantial security margin for data that needs to remain verifiable for decades or longer.
What is the internal structure of SHA3-384?
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SHA3-384 uses the Keccak-f[1600] permutation with specific rate and capacity parameters optimized for 384-bit output. It operates through 24 rounds on a 1600-bit state.
Does SHA3-384 have hardware acceleration?
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Intel Ice Lake and newer processors include SHA-3 instructions (VAES + VPCLMULQDQ) that accelerate Keccak permutations, improving SHA3-384 performance significantly.
Can SHA3-384 be used for HMAC?
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While possible, HMAC is unnecessary for SHA3-384 because Keccak sponge is inherently immune to length-extension attacks. Raw SHA3-384 already provides the security that HMAC adds to Merkle-Damgard hashes.
What makes SHA3-384 different from SHA-384?
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SHA3-384 uses the Keccak sponge construction (FIPS 202) while SHA-384 uses the Merkle-Damgard construction (FIPS 180-4). They are completely different algorithms that happen to produce the same output size.
Related Tools
SHA3-256 Hash Calculator — NIST 3rd Gen Keccak Standard
NIST third-generation hash with 256-bit output. Built on Keccak sponge — shares zero code with SHA-2, providing cryptographic diversity.
SHA3-512 Hash Calculator — Maximum Keccak Sponge Output
The largest SHA-3 variant at 512 bits. Keccak-based, NIST-recommended as a cryptographically independent alternative to SHA-512.