AES-256加密U盘密码遗忘后的恢复方案咨询

Hey there, let's work through this carefully—you're in a critical spot with only 3 password attempts left on your JQSC-XC002 USB drive, so we need to avoid any missteps that could lock you out permanently. Here's my step-by-step advice:

• First, stop all direct attempts on the physical USB drive
  You already have a dump of the drive, which is a lifesaver. From now on, every test should be done on this mirrored image file, not the actual U盘. This protects you from using up those last 3 attempts accidentally.

• Analyze your dump file to identify the encryption implementation
  AES-256 is the cipher, but different manufacturers wrap this in custom containers or use specific key derivation functions (KDFs). Tools like disktype or testdisk can scan your image to reveal partition structures and clues about the encryption scheme (e.g., is it a vendor-specific encrypted volume, or a standard one like BitLocker?). Knowing this will let you pick the right cracking tools later.

• Leverage offline brute-forcing with your number-only password constraint
  Since your password is all digits, we can narrow the attack scope drastically. Tools like hashcat or John the Ripper are ideal here, but first you'll need to extract the encrypted hash or KDF output from your image (the exact method depends on the encryption scheme you identified). For example:

  • If it's a 6-digit PIN, you can use a mask attack in hashcat with a command like:
    hashcat -m [your-hash-mode] -a 3 extracted-hash.txt ?d?d?d?d?d?d
    Replace [your-hash-mode] with the code matching your drive's encryption (e.g., 13100 for BitLocker). This will iterate through all 6-digit combinations far faster than testing on the physical drive.

• Prioritize targeted guesses before full brute-force
  Number passwords are almost always tied to personal info. List out every relevant number sequence you can think of: birthdays, phone number suffixes, postal codes, old PINs, anniversary dates, or even repeated digits you might have used. Test these first on your image—this could save you hours of brute-forcing.

• Check for vendor-specific recovery options
  Look up the manufacturer of the JQSC-XC002 drive. Some vendors offer password reset processes if you can verify ownership (though this usually erases all data). Since you have a dump, you can safely explore this option without risking your data—just make sure the image is stored securely first.

A quick reality check: AES-256 is extremely secure, so brute-forcing long digit passwords (10+ digits) is practically impossible with consumer hardware. Focus on targeted guesses first, then move to short-length brute-force only if you're certain the password is short.

备注：内容来源于stack exchange，提问作者Vladi Kura