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SHA3-384 Hash Generator

Generate SHA3-384 hashes online instantly. NIST FIPS 202 standard, Keccak sponge construction. 384-bit (96 hex character) output. Supports UTF-8, Hex, Base64 input and HMAC-SHA3-384.

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Related Hash Tools

SHA3-384 FileHash from file SHA3-256256-bit SHA-3 SHA3-512512-bit SHA-3 SHA384384-bit SHA-2 SHAKE256Variable output XOF

Frequently Asked Questions

What is SHA3-384?
SHA3-384 is the 384-bit SHA-3 variant from NIST FIPS 202 (2015). It uses the Keccak sponge with a 832-bit rate and 768-bit capacity, producing a 96-character hexadecimal digest.
SHA3-384 vs SHA-384 — what is the difference?
SHA-384 is a truncated SHA-512 using Merkle-Damgård construction. SHA3-384 uses the Keccak sponge and is immune to length-extension attacks. Both output 384 bits but are completely different algorithms.
When should I use SHA3-384?
Use SHA3-384 when you need 384-bit security with FIPS 202 compliance. It is appropriate for digital signatures, TLS handshake hashing at high security levels, and certificate authorities requiring SHA-3.
Is SHA3-384 affected by length-extension attacks?
No. The Keccak sponge construction absorbs more input bits than it outputs, so an attacker cannot extend the hash to include additional data without knowing the internal state.

About SHA3-384 Hash Generator

SHA3-384 is the 384-bit member of the NIST SHA-3 family (FIPS 202, 2015). It uses the Keccak sponge construction with a 832-bit rate and 768-bit capacity. Input is absorbed in 104-byte blocks and 384 bits (48 bytes, 96 hex characters) are squeezed out as the digest.

Keccak Sponge at 384-bit Security

The 768-bit capacity of SHA3-384 provides a collision resistance of approximately 192 bits and preimage resistance of 384 bits. This exceeds the security requirements for most current applications and is suitable for long-term storage of sensitive data hashes.

Comparison to SHA-384

SHA-384 (from SHA-2) and SHA3-384 both produce 384-bit outputs but are algorithmically unrelated. SHA-384 uses the Merkle-Damgård construction (vulnerable to length-extension attacks) while SHA3-384 uses the sponge construction (immune). For new applications, SHA3-384 is recommended when SHA-3 compliance is required.

Applications

SHA3-384 is used in high-assurance government and military cryptography, FIPS 202-compliant digital signature schemes, and applications requiring a larger security margin than SHA3-256 provides. It is also suitable for certificate fingerprints and key derivation in high-security systems.