Logical Blocks, which are numbered from first to last within the volume. There are two types of Blocks in the HFS. Disk formatted with HFS has 512-byte Blocks at Physical level. Devices running on IOS operating system are called IOS devices.Īpple developed Hierarchical File System (HFS) which provides large data sets. Sometimes needs to perform offensive techniques like password cracking, Jail Breaking.Īpple developed an operating system for iPhone, iPad and iPod Touch which is known as the IOS operating system. Logical - This method allows to extract particular files from the file system like backup taken using iTunes.File system - This method would extract files that are visible at the file system level.Unfortunately, with mobile forensic always it is not possible to use this method. Physical - It is a bit-to-bit copy of the device and allows recovering deleted data.Below overview has been given about each. There are three methods used for the data extraction from the IOS devices. But we could calculate the hash value of the extracted data through logical extraction or of the image file extracted through physical extraction. As previously mentioned it is almost impossible to interact with mobile devices without altering them. MD5 or SHA are widely used algorithms to calculate the Hash values of the evidence.
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