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UltraISO
Optical disc authoring software From Wikipedia, the free encyclopedia
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UltraISO is a crippleware application for Microsoft Windows for creating, modifying and converting ISO image files used for optical disc authoring, currently being produced by EZB Systems.
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Initially UltraISO was shareware however since 2006 it has turned into commercial software.[2] The 'Free Trial' version is limited to ISO images of 300 MB or less, effectively making it Crippleware.[3]
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ISZ format
UltraISO uses a proprietary format known as ISZ. The format is advertised as "ISO Zipped", even though it is not a simple zip archive. The format uses zlib or bzip2 to compress the data, and may use AES-128,192 or 256 encryption in the CBC mode[4] (note that this provides no integrity protection and is vulnerable to the padding oracle attack[5]). The file format specification is available publicly on EZB Systems's website.[4] The format is now supported by third-party applications such as Daemon Tools, Alcohol 120%, CDemu and isz-tool.
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