Haval-192 (3 rounds) Hash

What is Haval-192 (3 rounds)?

Haval-192 (3 rounds) is a cryptographic hash function derived from the **HAVAL** family, designed by **Yuliang Zheng** and **Xuejia Lai** in 1995 as an extension of the MD4/MD5 family. Structurally, it operates as a **merging network hash function**, processing input data in 512-bit blocks via a **compression function** that iterates through three distinct rounds (each consisting of 32 compression steps) to produce a **192-bit (24-byte) hash output**. The algorithm employs a **non-linear Feistel network** with four 48-bit subkeys per round, derived from a 128-bit master key (though in standard mode, no explicit key is used for hashing). Its primary use-case was as a **collision-resistant** alternative to MD5, particularly in scenarios requiring higher security than SHA-1, though it was never standardized by NIST. The design prioritizes **avalanche effect**—where small input changes drastically alter the output—but lacks the formal cryptanalysis scrutiny of later algorithms like SHA-2 or BLAKE3.

HAVAL-192 (3 rounds) is vulnerable to cracking due to its **limited compression rounds** (only 96 total steps), which weaken its resistance to **length-extension attacks** and **preimage attacks**. The **3-round variant** is particularly susceptible because it fails to sufficiently mix data across blocks, enabling **distinguished attacks** that exploit structural weaknesses in the Feistel rounds. Additionally, its **lack of a salt** in standard usage makes it prone to **rainbow table attacks** when used for password hashing. Modern **GPU/ASIC optimizations** (e.g., parallelized brute-force tools like **Hashcat**) exploit its **predictable compression function**, allowing for **collision generation** at significantly lower computational cost than SHA-1. The algorithm’s **smaller output size (192 bits)** also reduces the **security margin** against brute-force attacks, with collision resistance estimated at ~2¹⁰⁰ operations—far weaker than modern 256-bit hashes.

Identifying Haval-192 (3 rounds) Hashes

Identifying a hash blindly is often difficult because multiple algorithms can output strings of the exact same length. For example, a standard 32-character hexadecimal string could be MD5, NTLM, MD4, or LM. To definitively identify Haval-192 (3 rounds), security researchers analyze the hash against a strict regular expression (regex) signature (shown above) to find structural matches.

How to Crack Haval-192 (3 rounds)

If you need to recover the plaintext password for a Haval-192 (3 rounds) hash during a penetration test or forensics investigation, you must supply the correct module ID to your cracking software. Use the exact commands provided at the top of this page to target the hash successfully.