Data Digester Basic Edition (BE)
The Data Digester Basic Edition (BE) is the smallest and cost-effective solution for all users searching for a single tool to examine message digests (aka checksums) and to verify OpenPGP signatures. The Basic Edition provides support for the commonly used message digest algorithms like MD5 and SHA as well as for OpenPGP signatures.
The integrated file system window allows for an easy and intuitive working with files and directories. Simply locate the archived or downloaded files on your PC, then double-click the message digest or OpenPGP signature file and the Data Digester starts working. After an instant, you are informed whether the referenced target files have been checked/verified successfully or if they were corrupted or manipulated and should not be used any further for security reasons.
The key features of the Data Digester Basic Edition at a glance:
The check docking window is the central component to setup the file checking process. Here you can configure the available options used for file analysis and digest/signature calculation. Additionally, this is the place where you can search directories and subdirectories for files so that checksum files in entire directory trees can be processed (e.g. useful for backups). The Data Digester software also handles checksum files or examinee files passed as command line parameters. For some operating systems like Windows it is possible that the installer registers the Data Digester software to process files with typical file extensions. For example you can double-click a *.sha file within the Windows© Explorer application which then opens the Data Digester software.
The most common file format used for checksum files on the Internet is the GNU format. The data is stored as text lines each of which holding a calculated checksum for exactly one single original file. Another widely used file format for checksum files on the Internet is the BSD file format. Like GNU format files, the checksum values are stored as separate text lines for each original file while the line format is slightly different for BSD format files.
Wherever possible the new Digester XML file format should be preferred which can be used very efficiently together with the Data Digester software. Here you can also create single checksum files for each original file but the checksums can also be bundled together in arbitrary combinations even over drive boundaries. Another advantage of the Digester XML format is the capability to store intermediate digests. While GNU/BSD files can only contain one single checksum for each original file, the use of Digester XML files allows to store as many digests/signatures as desired. Unnecessary to mention that Digester XML files can also contain OpenPGP signatures, so it's one format for all.
Here you can view some Digester XML examples.
In the example shown below a large Linux ISO image file has been specified. By clicking the Go button the Data Digester software searches for usable checksums on the server and offers them for checking. The ISO file may then be downloaded to a local directory of your choice. If message digest files have been found and selected, the downloaded file is automatically checked against the checksums while the file is being downloaded. Once the download is complete the checking results are presented. This is an easy way to ensure that downloaded files are valid. With OpenPGP signatures it is also possible to check if the downloads really come from where they claim to originate.
The Data Digester Basic edition is the ideal solution to check the integrity of large file collections like server backups or multimedia document archives. While single files may be checked with checksums and signatures, the Data Digester software allows one to check directories and whole file system trees in one single step. If any files were corrupted or somehow manipulated, this will be detected during the checking phase. The invalid data could then be replaced e.g. by a second valid backup or redundant data store.
Future versions of the Data Digester software will add support for mobile devices like smart phones and tablets. So the marketing slogan "Write once, run everywhere" becomes reality.
The Data Digester software may also be run directly from a website by clicking the Launch button (an appropriate Java runtime environment must be installed on the PC). The application is then downloaded and started right away. If the software is started the next time using the desktop icon or the link again, the application is not downloaded again but started from the local cache. There is no need for time consuming installations, so Java Web Start is the ideal mechanism to execute the Data Digester software on a customers' site, on temporarily used PCs, or mobile devices like notebooks.
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