SHA3-384 Hash Generator: Post-Quantum Keccak Hash Online
SHA3-384 hash generator online: Keccak sponge 384-bit output with 192-bit security, a post-quantum alternative to SHA-384.
Updated 2026-08-16
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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
- 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
- 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?
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. (See: NIST FIPS 202)
Why SHA3-384 over SHA3-256?
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. (See: NIST FIPS 202)
Is SHA3-384 quantum-safe?
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?
High-security government systems, long-term digital archives, and applications requiring NIST's highest SHA-3 security level for digital signatures.
What makes SHA3-384 different from SHA-384?
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 96-character output size, and SHA3-384 runs at roughly half the software speed of SHA-384 due to Keccak's larger internal state, a trade-off usually worth it for critical applications.
Is SHA3-384 suitable for long-term archiving?
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?
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?
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?
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.
How many hex characters does SHA3-384 produce?
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.
Why does my SHA3-384 hash differ from other tools or websites?
Hash output depends on the exact input bytes, and the usual culprits are invisible differences: UTF-8 vs UTF-16 encoding (common when pasting from Windows apps), a trailing newline added by some editors or echo commands, a byte-order mark at the start, or a leading/trailing space. Also verify the algorithm and its variant (SHA-512 vs SHA-384, Keccak vs SHA3, BLAKE2b vs BLAKE3), since they produce different digests for the same input. This tool hashes the exact text you paste; compare like for like.