sha224(sha224($salt).sha224($pass)) Hash

What is sha224(sha224($salt).sha224($pass))?

The cryptographic hash format `sha224(sha224($salt).sha224($pass))` is a nested hashing scheme derived from the SHA-2 family of cryptographic hash functions, specifically SHA-224, which is a truncated variant of SHA-256 with a 224-bit (28-byte) output. This construction was historically employed in password storage systems to mitigate certain types of cryptanalysis, particularly against brute-force and rainbow table attacks. The structure involves two sequential applications of SHA-224: first, the input password (`$pass`) is hashed, then concatenated with a unique salt (`$salt`), and the resulting string is hashed again. The salt, a random or pseudo-random value appended to the password before hashing, ensures that even identical passwords produce unique hash outputs, thwarting precomputed attack vectors. While not a standard or formally standardized scheme, this method was occasionally adopted in legacy systems—particularly in early implementations of password hashing—to balance computational overhead with security against emerging attack vectors like GPU-accelerated cracking.

Despite its layered approach, this scheme is fundamentally vulnerable due to its reliance on SHA-224’s inherent weaknesses and architectural flaws. The primary flaw lies in its susceptibility to **precomputed attack tables** (rainbow tables) despite salting, as the nested hashing does not significantly increase the effective key space—SHA-224’s 224-bit output remains vulnerable to brute-force cracking when combined with optimized hardware (e.g., FPGA/ASIC or GPU clusters). Additionally, the concatenation of two SHA-224 hashes (`sha224($salt).sha224($pass)`) introduces **collision vulnerabilities** due to the birthday paradox, as the combined space does not scale linearly with security. Modern cryptanalysis tools, leveraging parallelized hashing (e.g., via CUDA or OpenCL), can evaluate billions of hashes per second, rendering this scheme impractical for real-world security. Furthermore, SHA-224’s reduced output size compared to SHA-256 or SHA-512 exacerbates the problem, as shorter hashes are computationally easier to reverse-engineer via dictionary or hybrid attacks. The lack of iterative hashing (e.g., repeated hashing with feedback) further weakens its resistance to timing attacks and optimized cracking pipelines.

Identifying sha224(sha224($salt).sha224($pass)) 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 sha224(sha224($salt).sha224($pass)), security researchers analyze the hash against a strict regular expression (regex) signature (shown above) to find structural matches.

How to Crack sha224(sha224($salt).sha224($pass))

If you need to recover the plaintext password for a sha224(sha224($salt).sha224($pass)) 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.