Some excellent work here. An internal US Government agency audit showed that a fifth of passwords were easy to crack. Their recently published study showed that hashes for well over 80,000 AD accounts included passwords like Password1234, Password1234!, and ChangeItN0w!
usb copy protection 500 crack
I have developed a software piece (with C and Python) which I want to protect with dongle so that copying and reverse engineering becomes hard enough. My dongle device comes with an api which provides these:
What I can do in the source code so that it becomes harder to crack. Dongle provider suggested that, I should check proper dongle existence in a loop or after an event, or I should use the dongle memory in an efficient way. But how? I have no idea how crackers crack. Please shed some light. Thanks in advance.
I would find a key portion of your code, something that's difficult or hard to know, something that requires domain knowledge. Then put that knowledge onto the key. One example of this would be shader routines. Shader routines are text files that are sent to a graphics card to achieve particular effects; a very simple brightness/contrast filter would take less than 500 characters to implement, and you can store that in the user space on most dongles. Then you put that information on the key, and only use information from the key in order to show images. That way, if someone tries to just simply remove your dongle, all the images in your program will be blacked out. It would take someone either having a copy of your program, grabbing the text file from the key, and then modifying your program to include that text file, and then knowing that that particular file will be the 'right' way to display images. Particulars of implementation depend on your deployment platform. If you're running a program in WPF, for instance, you might be able to store a directx routine onto your key, and then load that routine from the key and apply the effect to all the images in your app. The cracker then has to be able to intercept that directx routine and apply it properly.
How much of a roadblock will these clevernesses get you? Realistically, it depends on the popularity of your program. The more popular your program, the more likely someone will want to crack it, and will devote their time to doing so. In that scenario, you might have a few days if you're particularly good at dongle coding. If your program is not that popular (only a few hundred customers, say), then just the presence of a dongle could be deterrent enough without having to do anything clever.
Crackers will crack by sniffing the traffic between your app and the dongle and either disabling any code that tests for dongle presence or writing code to emulate the dongle (e.g. by replaying recorded traffic), whichever looks easier.
If you have the ability to execute code inside the dongle, you could move code that performs functions critical to your application there, which would mean that the crackers must either rederive the code or break the dongle's physical security - a much more expensive proposal (though still feasible; realise that there is no such thing as perfect security).
Use API together with Enveloper if an enveloper exists for your resulting file format. This is a very basic rule. Because our enveloper is already equipped with some anti-debugging and obfuscating methods to prevent common newbie hackers to give up hacking the program. Only using enveloper is also not recommended, because once a hacker can break the enveloper protection in other program, they can also break yours.
Use multiple dlls/libraries (if applicable) to call dongle functions. In case one dll is hacked, then there are still other parts of the software that uses the functions from another dll. For example, copying sdx.dll to print.dll, open.dll, and other names, then define the function calls from each dll with different names.
If you make a lot of different calls to your dongle, then maybe the cracker will just emulate your dongle -- or find a single point of failure (quite common to change one or two bytes and all your calls are useless). It is a no-win situation.
As the author of PECompact, I always tell customers that they can not rely on anything to protect their software -- as it can and will be cracked if a dedicated cracker goes after it. The harder you make it, the more of a challenge (fun) it is to them.
A dongle will perhaps prevent your average user from copying your software - so in that sense it is already 'enough'. But anyone who feels the need and is able to circumvent the dongle will likely be able to get past any other scheme that you engineer.
The Freecom ToughDrive requires a password whenever the drive is plugged in, but only allows 5 attempts before it needs to be power cycled. Entering the passwords was easy to automate, but there was still the issue of unplugging the drive after five failed attempts. [Marco] called upon his friend [Alex] to build a small USB extension cable with a relay inserted into the 5 V line. An easy enough solution after which the only thing needed was the time to crack the password.
Windows 10 passwords stored as NTLM hashes can be dumped and exfiltrated to an attacker's system in seconds. The hashes can be very easily brute-forced and cracked to reveal the passwords in plaintext using a combination of tools, including Mimikatz, ProcDump, John the Ripper, and Hashcat.
Click on the "Virus & threat protection settings" and disable all of the available options. Alternatively, a virtual machine that doesn't have Windows Defender or Smartscreen installed can be configured for Mimikatz antics.
Then, use the sekurlsa::logonPasswords command to extract hashed credentials. Since Windows 8, plaintext passwords are no longer stored in memory without further modifying the operating system. But that doesn't mean Windows 10 hashes can be brute-forced and easily cracked. In line 12, we'll find the hashed password in NTLM format.
As a little experiment, I wanted to learn how long it would take a Raspberry Pi 3B+, common Intel i7 CPU, and GeForce GTX GPU to crack the same hash consisting of six random characters and ending with two random numbers (e.g., nchfyr56).
For hackers with dedicated brute-force machines, two days is very much within the realm of realistic. With a cluster of superior GPUs, an attacker can easily crack any hash derived from a wider keyspace.
Monitor for hash dumpers opening the Security Accounts Manager (SAM) on the local file system (%SystemRoot%/system32/config/SAM). Some hash dumpers will open the local file system as a device and parse to the SAM table to avoid file access defenses. Others will make an in-memory copy of the SAM table before reading hashes. Detection of compromised Valid Accounts in-use by adversaries may help as well.
Monitor for the SAM registry key dump being created to access stored account password hashes. Some hash dumpers will open the local file system as a device and parse to the SAM table to avoid file access defenses. Others will make an in-memory copy of the SAM table before reading hashes. Detection of compromised Valid Accounts in-use by adversaries may help as well.
FileOpen Crack: FileOpen Publisher & WebPublisher crack updatedThe Inept PDF Decrypter released back in June to decrypt FileOpen PDF files is being actively updated (FileOpen crack updates occurred in July, August & September). The publisher claims that the FileOpen hack script will remove all DRM restrictions from any FileOpen protected pdf file produced by FileOpen Publisher, FileOpen WebPublisher, FileOpen RightsManager or FileOpen RightsServer.
Barnes and Noble EPUB DRM crackedThe Barnes & Noble Desktop Reader application (BDReader) uses a modified Adobe Adept scheme, and stores decryption keys in plain text in a SQLite database, thus proving to be an easy attack.
Protected PDF crack / hack: PDF security through obscurityA hack to unlock protectedpdf files has been published that clearly shows the security offered by this PDF DRM software is simple to remove and is therefore no better than standard Adobe PDF password protection.
Adobe Acrobat user gaffe exposes classified Defense informationA military report on an investigation into the shooting death of an Italian security agent includes blocks of classified data that can be deciphered as easily as copying and pasting text. Multinational Forces-Iraq issued the report in Adobe Portable Document Format on April 30 as an unclassified document, with blocks of classified redacted information obscured from public view. But copying and pasting the classified sections into Microsoft Notepad reveals the blocked text. The breach was discovered by an Italian blogger shortly after the report was posted.
Cracks, vulnerabilities, issues and flaws reported on Adobe PDF Security, Adobe DRM, FileOpen, FileOpen Publisher, FileOpen WebPublisher, PDF plugins, and poor PDF security and secure ebook implementations. Adobe vulnerabilities, PDF password crackers and malicious PDF JavaScript.
Stop copying, editing, savingDisable PDF PrintsBlock ScreenshotsDisable Copy PasteDynamic WatermarksExpiry & Self DestructRevoke DocumentsDevice LockingLocation LockingTrack PDF UsePRICING
Historically, various forms of encryption have been used to aid in cryptography. Early encryption techniques were often used in military messaging. Since then, new techniques have emerged and become commonplace in all areas of modern computing.[1] Modern encryption schemes use the concepts of public-key and symmetric-key.[1] Modern encryption techniques ensure security because modern computers are inefficient at cracking the encryption.
Encryption has long been used by militaries and governments to facilitate secret communication. It is now commonly used in protecting information within many kinds of civilian systems. For example, the Computer Security Institute reported that in 2007, 71% of companies surveyed utilized encryption for some of their data in transit, and 53% utilized encryption for some of their data in storage.[19] Encryption can be used to protect data "at rest", such as information stored on computers and storage devices (e.g. USB flash drives). In recent years, there have been numerous reports of confidential data, such as customers' personal records, being exposed through loss or theft of laptops or backup drives; encrypting such files at rest helps protect them if physical security measures fail.[20][21][22] Digital rights management systems, which prevent unauthorized use or reproduction of copyrighted material and protect software against reverse engineering (see also copy protection), is another somewhat different example of using encryption on data at rest.[23] 2ff7e9595c
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