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The Electronic Development Application, or EDA, lets you submit Development Applications (DA) electronically. With EDA, you can submit text files and CAD drawings, and get them 'signed' and 'approved' on-line. EDAform is the electronic form for making applications.Platform: Windows-License: FreewareSize: 19.6 MBReleased: 19 February, 2012Download:GeoDa is a free software program that serves as an introduction to spatial data analysis. OpenGeoDa is the cross-platform, open source version of Legacy GeoDa.
While Legacy GeoDa only runs on Windows XP, OpenGeoDa runs on different versions of Windows (including XP, Vista and 7), Mac OS, and Linux. It is written in C and no longer relies on ESRI's.Platform: Windows-License: FreewareSize: 800.1 KBReleased: 29 January, 2012Download:BinViewer is a Windows application that allows viewing binary files. It has hexadecimal and text windows to display binary file content; provides fast navigation, binary and text searches. 64-bit file access implemented. Since BinViewer doesn't load the whole files into memory, it is unlikely that computer memory resources become a limiting.Platform: Windows-License: FreewareSize: 1.3 MBReleased: 21 January, 2012Download:Most EDA programs like the LayoutEditor don't have elementary bezier curves. So any bezier curve is converted into a polyline.
How precise this conversion is done can be setup via the iterations value. A higher value will result in a finer resolution and a higher number of point. A Iteration of 0 will directly connect start and end point without.Platform: Windows-License: FreewareSize: 19.4 MBReleased: 20 May, 2012Download:General purpose converter of BioSemi's 24-bit data format (.bdf) to NeuroScan's 16-bit data format (.cnt). PolyRex is a polygraphic recording data exchange software for Windows.
This article needs additional citations for. Unsourced material may be challenged and removed.Find sources: – ( September 2013) Software cracking (known as 'breaking' in the 1980s ) is the modification of to remove or disable features which are considered undesirable by the person cracking the software, especially features (including protection against the manipulation of software, serial number, hardware key, date checks and disc check) or software annoyances like and.A crack refers to the means of achieving, for example a stolen or a tool that performs that act of cracking. Some of these tools are called,. A keygen is a handmade product serial number generator that often offers the ability to generate working serial numbers in your own name. A patch is a small computer program that modifies the machine code of another program. This has the advantage for a cracker to not include a large executable in a release when only a few bytes are changed.
A loader modifies the startup flow of a program and does not remove the protection but circumvents it. A well-known example of a loader is a used to cheat in games. Pointed out in one of their files that these type of cracks are not allowed for game releases. A has shown that the protection may not kick in at any point for it to be a valid crack.The distribution of cracked copies is illegal in most countries. There have been lawsuits over cracking software. It might be legal to use cracked software in certain circumstances. Educational resources for and software cracking are, however, legal and available in the form of programs.
Contents.History The first software copy protection was applied to software for the, and computers. Software publishers have implemented increasingly complex methods in an effort to stop unauthorized copying of software.On the Apple II, unlike modern computers that use standardized device drivers to manage device communications, the operating system directly controlled the step motor that moves the floppy drive head, and also directly interpreted the raw data, called nibbles, read from each track to identify the data sectors. This allowed complex disk-based software copy protection, by storing data on half tracks (0, 1, 2.5, 3.5, 5, 6.), quarter tracks (0, 1, 2.25, 3.75, 5, 6.), and any combination thereof.
In addition, tracks did not need to be perfect rings, but could be sectioned so that sectors could be staggered across overlapping offset tracks, the most extreme version being known as spiral tracking. It was also discovered that many floppy drives did not have a fixed upper limit to head movement, and it was sometimes possible to write an additional 36th track above the normal 35 tracks.
The standard Apple II copy programs could not read such protected floppy disks, since the standard DOS assumed that all disks had a uniform 35-track, 13- or 16-sector layout. Special nibble-copy programs such as Locksmith and Copy II Plus could sometimes duplicate these disks by using a reference library of known protection methods; when protected programs were cracked they would be completely stripped of the copy protection system, and transferred onto a standard format disk that any normal Apple II copy program could read.One of the primary routes to hacking these early copy protections was to run a program that simulates the normal CPU operation.
The CPU simulator provides a number of extra features to the hacker, such as the ability to single-step through each processor instruction and to examine the CPU registers and modified memory spaces as the simulation runs (any modern disassembler/debugger can do this). The Apple II provided a built-in opcode disassembler, allowing raw memory to be decoded into CPU opcodes, and this would be utilized to examine what the copy-protection was about to do next. Generally there was little to no defense available to the copy protection system, since all its secrets are made visible through the simulation. However, because the simulation itself must run on the original CPU, in addition to the software being hacked, the simulation would often run extremely slowly even at maximum speed.On Atari 8-bit computers, the most common protection method was via 'bad sectors'. These were sectors on the disk that were intentionally unreadable by the disk drive.
The software would look for these sectors when the program was loading and would stop loading if an error code was not returned when accessing these sectors. Special copy programs were available that would copy the disk and remember any bad sectors. The user could then use an application to spin the drive by constantly reading a single sector and display the drive RPM. With the disk drive top removed a small screwdriver could be used to slow the drive RPM below a certain point. Once the drive was slowed down the application could then go and write 'bad sectors' where needed.
When done the drive RPM was sped up back to normal and an uncracked copy was made. Of course cracking the software to expect good sectors made for readily copied disks without the need to meddle with the disk drive. As time went on more sophisticated methods were developed, but almost all involved some form of malformed disk data, such as a sector that might return different data on separate accesses due to bad data alignment. Products became available (from companies such as ) which replaced the controller BIOS in Atari's 'smart' drives. These upgraded drives allowed the user to make exact copies of the original program with copy protections in place on the new disk.On the Commodore 64, several methods were used to protect software. For software distributed on, subroutines were included which attempted to write over the program code. If the software was on ROM, nothing would happen, but if the software had been moved to, the software would be disabled.
Because of the operation of Commodore floppy drives, one write protection scheme would cause the floppy drive head to bang against the end of its rail, which could cause the drive head to become misaligned. In some cases, cracked versions of software were desirable to avoid this result. A misaligned drive head was rare usually fixing itself by smashing against the rail stops. Another brutal protection scheme was grinding from track 1 to 40 and back a few times.Most of the early software crackers were computer hobbyists who often formed groups that competed against each other in the cracking and spreading of software. Breaking a new copy protection scheme as quickly as possible was often regarded as an opportunity to demonstrate one's technical superiority rather than a possibility of money-making. Some low skilled hobbyists would take already cracked software and edit various unencrypted strings of text in it to change messages a game would tell a game player, often something considered vulgar. Uploading the altered copies on file sharing networks provided a source of laughs for adult users.
The cracker groups of the 1980s started to advertise themselves and their skills by attaching animated screens known as in the software programs they cracked and released. Once the technical competition had expanded from the challenges of cracking to the challenges of creating visually stunning intros, the foundations for a new subculture known as were established.
Demoscene started to separate itself from the illegal 'warez scene' during the 1990s and is now regarded as a completely different subculture. Many software crackers have later grown into extremely capable software reverse engineers; the deep knowledge of assembly required in order to crack protections enables them to in order to port them from binary-only drivers for to drivers with source code for and other operating systems. Also because music and game intro was such an integral part of gaming the music format and graphics became very popular when hardware became affordable for the home user.With the rise of the, software crackers developed secretive online organizations. In the latter half of the nineties, one of the most respected sources of information about 'software protection reversing' was 's website.Most of the well-known or 'elite' cracking groups make software cracks entirely for respect in the ', not profit. From there, the cracks are eventually leaked onto public Internet sites by people/crackers who use well-protected/secure FTP release archives, which are made into full copies and sometimes sold illegally by other parties.today is formed of small groups of skilled people, who informally compete to have the best crackers, methods of cracking, and.+HCU The High Cracking University (+HCU), was founded by (+ORC), considered a genius of reverse engineering and a legendary figure in RCE, to advance research into (RCE). He had also taught and authored many papers on the subject, and his texts are considered classics in the field and are mandatory reading for students of RCE.The addition of the '+' sign in front of the nickname of a reverser signified membership in the +HCU. Amongst the students of +HCU were the top of the elite Windows reversers worldwide.
+HCU published a new reverse engineering problem annually and a small number of respondents with the best replies qualified for an undergraduate position at the university.+Fravia was a professor at +HCU. Fravia's website was known as '+Fravia's Pages of Reverse Engineering' and he used it to challenge programmers as well as the wider society to 'reverse engineer' the 'brainwashing of a corrupt and rampant materialism'. In its heyday, his website received millions of visitors per year and its influence was 'widespread'.Nowadays most of the graduates of +HCU have migrated to Linux and few have remained as Windows reversers.
The information at the university has been rediscovered by a new generation of researchers and practitioners of RCE who have started new research projects in the field. Methods The most common software crack is the modification of an application's binary to cause or prevent a specific key branch in the program's execution. This is accomplished by the compiled program code using a such as, or until the software cracker reaches the that contains the primary method of protecting the software (or by an executable file with a program such as ). The binary is then modified using the or a or in a manner that replaces a prior branching with its complement or a so the key branch will either always execute a specific or skip over it. Almost all common software cracks are a variation of this type. Developers are constantly developing techniques such as, and to make this modification increasingly difficult.
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Even with these measures being taken, developers struggle to combat software cracking. This is because it is very common for a professional to publicly release a simple cracked EXE or Retrium Installer for public download, eliminating the need for inexperienced users to crack the software themselves.A specific example of this technique is a crack that removes the expiration period from a time-limited trial of an application. These cracks are usually programs that alter the program executable and sometimes the linked to the application. Similar cracks are available for software that requires a hardware. A company can also break the copy protection of programs that they have legally purchased but that are to particular hardware, so that there is no risk of downtime due to hardware failure (and, of course, no need to restrict oneself to running the software on bought hardware only).Another method is the use of special software such as to scan for the use of a commercial copy protection application. After discovering the software used to protect the application, another tool may be used to remove the copy protection from the software on the.
This may enable another program such as, or to copy the protected software to a user's hard disk. Popular commercial copy protection applications which may be scanned for include and StarForce.In other cases, it might be possible to a program in order to get access to the original or code on a than. This is often possible with and languages utilizing compilation. An example is cracking (or debugging) on the.NET platform where one might consider manipulating to achieve one's needs.