Hashcat Crc32 [ Exclusive | EDITION ]

CRC32 is so lightweight that your bottleneck becomes memory bandwidth and host-to-device transfer. Use these flags:

hashcat -m 11500 -a 3 -w 4 -O -D 2 crc32_hash.txt ?a?a?a?a?a?a?a?a

On a modern CPU (Intel i9-13900K, single core):

| Attack Mode | Speed (H/s) | Notes | |-------------|-------------|-------| | Dictionary | ~2–3 billion/s | CPU-bound, no memory latency | | Brute-force (mask) | ~2–3 billion/s | Same as dictionary | | Rule-based | ~1.5–2 billion/s | Slight overhead from rule engine | hashcat crc32

On GPU (NVIDIA RTX 4090):

| Attack Mode | Speed (H/s) | |-------------|-------------| | All attacks | ~1–2 billion/s* | CRC32 is so lightweight that your bottleneck becomes

*CRC32 on GPU is not significantly faster than CPU due to lightweight computation and PCIe transfer overhead; CPU often outperforms GPU for CRC32.

| Password Length | Total combinations (lowercase) | Time @ 2B/s | |----------------|-------------------------------|--------------| | 1–6 chars | ~321 million | < 1 second | | 1–7 chars | ~8.3 billion | ~4 seconds | | 1–8 chars | ~217 billion | ~108 seconds | | 1–9 chars | ~5.6 trillion | ~46 minutes | | 1–10 chars | ~146 trillion | ~20 hours | On a modern CPU (Intel i9-13900K, single core):

Conclusion: Any password ≤8 lowercase characters can be cracked in under 2 minutes (realistically, 1–7 chars in seconds).

Because CRC32 is computationally inexpensive and fast, developers sometimes mistakenly use it to verify passwords, API keys, or sensitive tokens. While efficient for detecting noise errors, CRC32 is not a cryptographic hash function. Unlike SHA-256 or MD5, it does not provide collision resistance or preimage resistance in a cryptographic sense.

# Append numbers and symbols
hashcat -m 11500 -a 0 hash.txt rockyou.txt -r best64.rule

CRC32 does not accept a salt. Rainbow table attacks are trivial – but with hashcat speeds, rainbow tables are obsolete.