Data Digester Standard Edition (SE)
With the Data Digester Standard Edition (SE) you hold the perfect solution for message digests (aka checksums) and OpenPGP signatures in your hands. The inituitive application window is easy to use, so you can generate checksums and OpenPGP signatures even for whole server file systems with only a few mouse clicks. If you are a system administrator, you may want to use the command line interface digestercli to deploy the Data Digester software for your scripts and applications. The refresh mode helps to minimize the generation costs since only new or updated files are being processed.
The Data Digester Standard Edition has a built-in file system navigator where you can easily select single files or whole directories to be processed. Using the new Digester XML file format it is possible to generate and store arbitrary checksums, intermediate digests, and OpenPGP signatures together in one file. The generation template support allows you to configure the application to generate the digests/signatures appropriate for different environments (e.g. FTP server, multimedia archive, server backups).
The key features of the Data Digester Standard Edition at a glance:
Currently, the Data Digester supports the following message digest algorithms: MD2, MD4, MD5, RIPEMD-128, RIPEMD-160, RIPEMD-256, RIPEMD-320, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, Tiger, and Whirlpool.
The Data Digester software provides many ways to generate checksums and OpenPGP signatures. You should start with the Generate Wizard where you can choose the target files, select the desired message digest algorithms, and setup some basic options for the generation process. Then the most flexible way is to select single files or directories from within the built-in file system navigator window. Choose the desired message digest algorithm or OpenPGP key from the context menu (right mouse button) and the files are being generated. You will find all available options for the digest/signature generation centralized in the Generate docking window. Here you can adjust the message digest algorithms and associated file extensions, the file format options, the OpenPGP keys used for signatures, the many options to finetune the new Digester XML file format, as well as the options controlling the refresh mode.
Of course, all features of the Data Digester Basic Edition are also supported by the Data Digester Standard Edition.
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.
If you like to check and generate digests/signatures on remote file systems connected with common network protocols like FTP/SFTP then the Data Digester Enterprise Edition could be the right choice for you.
Of course, generation templates may be duplicated or transferred to another PC so your configurations may be easily shared with other users. This is also a convenient way to setup the Data Digester software on systems lacking a graphical environment e.g. if you work remotely on a UNIX system. The generation templates may be directly specified also as command line arguments for the digestercli application or for Apache Ant build scripts using the natively supported Digester Ant task.
OpenPGP signatures allow for more security compared to checksums since downloaded files may also be authenticated. If a OpenPGP signature created with a well-known public key could be successfully verified for a downloaded file, the file is both valid (not corrupted or manipulated) and it originates from the creator it claims to originate from.
If you already have generated OpenPGP key pairs, it is possible to import them into the Data Digester software with a few clicks. Passphrases may be stored securely along with the keys in order to support non-interactive processing and command line operation. It is also possible to enter the passphrases each time OpenPGP signature files are being generated. OpenPGP keys may be exported to be used by other OpenPGP applications like GnuPG or the enigmail plugin for Mozilla Thunderbird.
Future versions of the Data Digester software will add Android 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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