Data Digester Enterprise Edition (EE)
The Data Digester Enterprise Edition (EE) is the flagship of the Data Digester product series. It includes all features of the Basic Edition and Standard Edition, and adds sophisticated new functions to work with network file systems connected via FTP/SFTP and to synchronize files and directories based on checksums and signatures.
Checksums and OpenPGP signatures are not limited to integrity and authentication checking, but can also be deployed very efficiently for file synchronization. It's the ideal solution to transfer even large file collections from local to remote servers or vice versa while consuming only a minimum of time and bandwidth. By analyzing the available checksums and signatures the Data Digester software ensures that only new or modified files are being transferred. So you don't have to take care about the edited files, let the Data Digester do the job by simply pressing the Synchronize button. Read more...
The key features of the Data Digester Enterprise 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 mesage 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.
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.
Setting up a new sync mapping is easy: the Sync Wizard will guide you through the few necessary steps. After selecting the source and target entries which may be local or on a remote server, you can choose the formats of the checksum files as well as the message digest algorithms and OpenPGP keys (optional). The synchronization can then directly be started by pressing the Synchronize button provided by the sync window. The sync docking window is the central component where all synchonization options may be configured. Like the generation templates, also the sync options can be stored as mappings to support arbitrary sync operations for different environments.
The target set is not limited to one server connection. It is possible to setup two, three or more targets sets each containing files/directories on different server systems. The source entries are then checked against the entries of each server target set. Only new and modified files are being transferred to the servers. This allows for an easy and fast distribution of files and directories on remote servers (mirroring). If necessary, the source and target sets may be switched without creating a new mapping template in order to transfer entries in the other direction.
Arbitrary connections can be established using a specialized network file system navigator window. Each connection has its own tab and can therefore be handled independently from the others. Both the network and local file system navigators support drag & drop to interact with the sync docking window. The source and target sets of files and directories to be synchronized can be inserted easily by dragging the entries from the file system navigator windows. Checksums and OpenPGP signatures can be directly generated on the remote systems with the context menu (right mouse button) or the Generate and Refresh buttons of the generate window.
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 the Firefox browser.
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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