![]() ![]() is more than enough - I'll build the solution if this line of reasoning appears possible. I'm open to possible solutions to the problem, but just a lively discussion on whether this is feasible/practical/etc. dat files for us) has passed on to the otherworld where obsolete hardware goes once it malfunctions. More specifics of the system shouldn't be necessary, but the reason this issue has occurred is because our front-end system that shared the symmetric key (and auto-appended the. If the current file that it wants to decrypt/decompress, matching the #_#.dat signature, isn't encrypted then it bails too. Note that simply adding unencrypted files won't suffice - the system uses a hardware token for the encryption/decryption key (which is why I can't possibly recover it) AND it tries to decrypt each file individually using the logic: 1) lists archive 2) sorts by the above names where the first 2 digits represent the month 01-12 and the second 2 digits represent the year for 1997-2014 3) and then tries to extract the NEWEST file first - bail upon first decryption failure. to a backup file that the backend system can read. From the following 'Archive name and parameters' operating window, choose the 'General' tab. Step 3.From the sub-menu, click 'Add to archive'. Step 2.Select the folder you want to password protect and right-click on it. Step 1.Make sure you have got WINRAR program properly installed in your system. The goal, in layman's terms, is to add 06_14.dat, 07_14.dat, 08_14.dat, etc. Read below to know the method description. Since these tools recover key's 0-2 (3x 4-byte key triplet) per the zip 2.0 appnote (scroll to nearly the very end), in theory would it then be possible for those tools (or a modified open source zip utility that can write encrypted zip 2.0 archives) to initialize the keyset with the known-to-decrypt key triplet, generate a 12-byte 'random', and then use these values to add additional files to the existing archive? However, I am not interested in recovering the contents. There are various tools out there that can 'break' the zip 2.0 encryption with a known-plaintext attack, which allows recovery of the contents. ![]() However, I need to be able to add new files to existing encrypted archives. ![]() As a best practice, create a new password for each account. I don't have the ability to determine/recover the master password for a production system that uses zip 2 archives. In general, your password should be at least six characters long, though some industry experts say 12. ![]()
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