Fairly Secure Hashed Password Hash

What is Fairly Secure Hashed Password?

The **Fairly Secure Hashed Password (FSHP)** format emerged as an ad-hoc cryptographic scheme popularized in early 2000s web applications, particularly in legacy PHP-based systems, where developers sought a lightweight alternative to established hashing standards like bcrypt or PBKDF2. Structurally, FSHP typically involves a single SHA-1 (or MD5 in older implementations) hash of the plaintext password concatenated with a fixed or minimal salt (often derived from the username or a trivial prefix), producing a 160-bit (SHA-1) or 128-bit (MD5) hexadecimal digest. The format lacks standardized specifications, leading to inconsistent implementations—some systems omit salts entirely, while others append a rudimentary separator (e.g., `:`) to differentiate hashes from salts. Its primary use-case was in low-security contexts like forums or early social platforms where resistance to brute-force attacks was secondary to simplicity, though it was never intended for high-stakes applications like financial or identity verification.

FSHP is fundamentally vulnerable due to its reliance on weak cryptographic primitives and exploitable design flaws. SHA-1’s collision resistance is now compromised (e.g., SHA-1 hashing attacks like FREAK or recent SHA-1 preimage attacks), and its 160-bit output is insufficient against modern GPU-accelerated cracking tools like Hashcat, which can brute-force or rainbow-table SHA-1 hashes at rates exceeding 100M hashes/second. The absence of a robust salt (or its trivial derivation) eliminates per-user entropy, enabling offline dictionary attacks and rainbow table precomputation. Additionally, FSHP’s lack of iterative hashing (unlike bcrypt or Argon2) renders it susceptible to GPU/ASIC optimizations, as the algorithm’s constant-time complexity (O(1)) allows parallel decryption. Finally, the format’s reliance on legacy hashing functions (SHA-1/MD5) makes it incompatible with modern security best practices, such as key stretching or adaptive work factors, leaving stored credentials exposed to both precomputed attacks and evolving computational power.

Identifying Fairly Secure Hashed Password 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 Fairly Secure Hashed Password, security researchers analyze the hash against a strict regular expression (regex) signature (shown above) to find structural matches.

How to Crack Fairly Secure Hashed Password

If you need to recover the plaintext password for a Fairly Secure Hashed Password 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.