This online tool allows you to generate the hash sha384 of any string.
SHA384 length is 96 characters
Hash available
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What is SHA-384?
SHA-384 (Secure Hash Algorithm 384-bit) is a cryptographic hash function that belongs to the SHA-2 family. It is a truncated version of the SHA-512 algorithm. By producing a 384-bit digest, it offers a high level of security while being specifically optimized for 64-bit architectures, making it a very efficient and secure choice for high-performance computing environments.
How does SHA-384 hash work?
SHA-384 follows the Merkle-Damgård construction and shares the same core logic as SHA-512:
- Initialization: It uses eight 64-bit working registers, initialized with unique constants that differ from those used in SHA-512 to prevent cross-algorithm attacks.
- Padding: The input message is padded to be a multiple of 1024 bits.
- Processing: The message is processed in 1024-bit blocks. Each block undergoes 80 rounds of logical operations (XOR, AND, OR, NOT), rotations, and additions.
- Truncation: After the final block is processed, the resulting 512-bit state is truncated by discarding the final 128 bits, resulting in the final 384-bit output.
Key Characteristics
- 64-bit Optimization: Because it uses 64-bit registers, SHA-384 is significantly faster than SHA-256 on modern 64-bit processors, despite producing a larger hash.
- Security Margin: It provides a 192-bit security level against collision attacks. This is well above the threshold required for most modern security standards, making it highly suitable for high-security applications like digital certificates and TLS.
- Resistance to Length-Extension Attacks: By using different initialization constants than SHA-512, SHA-384 is inherently resistant to length-extension attacks, which is a common vulnerability in older hash functions like MD5 or SHA-1.
- Efficiency: It is often preferred in environments where SHA-512 is considered "too long" for a specific protocol, but where the superior speed of 64-bit processing is required over the 32-bit-optimized SHA-224 or SHA-256.
