Haval-160 (4 rounds) Hash

What is Haval-160 (4 rounds)?

The **Haval-160 (4 rounds)** algorithm is a member of the **Haval** family of cryptographic hash functions, designed by **Yuliang Zheng** in 1995 as part of the **NESSIE** (New European Schemes for Signatures, Integrity, and Encryption) project, though it was later adopted by the **ISO/IEC 10118-3** standard. Structurally, Haval-160 operates as a **variable-length input** hash function producing a **160-bit (20-byte) digest**, with the "4 rounds" variant referring to its compression function’s iterative design—specifically, four rounds of Feistel-like transformations per block. It inherits its core architecture from **MD4**, incorporating a **512-bit block size** processed via a **compression function** that mixes data through bitwise operations (AND, OR, XOR), modular addition, and carefully chosen rotation constants. Unlike SHA-1, Haval-160 was explicitly designed with **configurable digest lengths** (128, 160, 192, 224, or 256 bits) and **variable compression rounds** (3–5), prioritizing flexibility over raw performance. Its primary use-case was in **digital signatures (e.g., RSA-based)** and **message authentication codes (MACs)**, though it never achieved widespread adoption due to its complexity and eventual obsolescence amid stronger alternatives like SHA-256.

Haval-160 (4 rounds) suffers from **critical cryptographic weaknesses** stemming from its design choices and computational inefficiencies. The **4-round compression function** is insufficient for modern security standards, as cryptanalytic attacks—particularly **differential and linear cryptanalysis**—exploit its **limited diffusion and confusion** across iterations. The absence of a **salt** in keyed-HMAC variants renders it vulnerable to **rainbow table attacks** when used for password hashing, while its **512-bit block size** enables **meet-in-the-middle attacks** on truncated outputs (e.g., 128-bit digests). Furthermore, the algorithm’s **predictable round constants and fixed bitwise operations** allow for **GPU/ASIC optimizations**, enabling brute-force or collision-finding attacks at scalable speeds. Studies (e.g., **Chabaud & Vaudenay, 1999**) demonstrated that **preimage and second-preimage attacks** on 4-round Haval-160 are feasible with **O(2⁸⁰) complexity**, rendering it **insecure for modern applications**. Its legacy use in legacy systems (e.g., some early PKI infrastructures) is now deprecated in favor of **SHA-2 or BLAKE3** due to these fundamental flaws.

Identifying Haval-160 (4 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-160 (4 rounds), security researchers analyze the hash against a strict regular expression (regex) signature (shown above) to find structural matches.

How to Crack Haval-160 (4 rounds)

If you need to recover the plaintext password for a Haval-160 (4 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.