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  • bluearrow What are the size limits and PDF format restrictions on PDF files I can use?
  • Filesize is determined by the memory handling facilities of the target devices. For PCs and Macs large file sizes (e.g. 100Mbytes or more) should work in most cases, but on mobile devices their memory handling is much less sophisticated and they slice the memory up into 64Mb chuncks per application. We recommend that for distribution reasons (reliable downloading/fast downloading) and for memory management reasons, files should be kept to under 50Mb and preferably under 30Mb - the number of pages does not really matter - it can be 1000s. PDF files can be saved in a reduced size manner to ensure files are not too large and of course for screens (which have relatively low resolution) there is no need to use hi-resolution print-ready PDF formats - some publishing systems, like InDesign and Word, allowing you to export the conten as "For screen display" or "Minimum filesize" so this is the recommended approach. If the files are still too large then we recommend splitting them into 2 or more "volumes". As the files are viewed interactively it is important to include a Contents list (also known as a bookmark tree or outline) for fast navigation, [articularly for mobile devices. PDF files converted should not be set with Adobe-style protection and should not include embedded media such as 3D models or video clips. To provide video and audio support use links to separately hosted mp4 and mp3 files. See also our "All about PDF files" page: here
  • bluearrow What operating systems are supported?
  • All modern mainstream operating systems and variants are supported in the Javelin end user software (secure PDF readers): MS Windows, Apple OSX, Apple iOS and Google Android. The DrumlinPublisher and AdminApp software requires MS Windows with .NET4.5 or later. Windows 7 users who wish to take advantage of using the Javelin3 readers must make sure they have .NET4.5 or later installed otherwise the program will not run! Windows Server users with Remote Desktop (RDP) access should contact us for advice on implementation, but this environment is supported. Windows touch screen/RT devices are not supported - a keyboard and mouse are required. Publishers and end users should be aware that each mainstream operating system has many variants and implementations, so it is vital that the appropriate version of Javelin for their target platform is installed. Soome operating system and hardware setups may experience problems from time to time, e.g. after a major operating system "upgrade" and it is helpful to us if users and publishers report any such issues to us so we can check these
  • bluearrow Can other file formats, for example Word, Excel or PowerPoint, be converted and made secure?
  • Yes - to convert Word, Excel or PowerPoint files they are typically first converted to PDF using the Export to PDF facility in the MS Office suite - this produces the best/highest quality results
  • bluearrow How do authorization codes work to enable end users to view secured files?
  • When a publisher uses our free DrumlinPublisher software to create a new secure PDF in our encrypted format, the file itself (source PDF and encrypted PDF) remain on your local system. The DrumlinPublisher software exchanges metadata regarding the file with our DRM server, and the DRM server assigns the file a unique DocumentID or DocID when it is converted. This DocID information is stored within the DRM server and in an encrypted form within the secured PDF itself. The publisher in question also has a userID, so the DRM server also stores the ownership of every document alongside the DocID and other related data. When you want to make the secured file available (e.g. to sell it) to a third party, you need to provide them with the secure document itself, instructions for how to obtain the Javelin reader for their device, and details on how to download the file they have ordered. Let us suppose that the user purchases a document called myflightcourse.pdf and this has already been converted by you (or us on your behalf) to a secure (drmz) file, called myflightcourse.drmz and let us also suppose this document has been assigned a unique DocID of 123456 by our DRM server. In order for the user to be able to view the file they require some form of authorization, and to make this a very simple and automated process, the way this is done (as standard) is to provide the end user with an authorization code.

    An authorization code is just a (random) text string that has been pre-generated via the Codes tab on the DrumlinPublisher software. DrumlinPublisher will only allow you to generate codes for files that you created/own, and when it generates a set of codes (e.g. 50 codes for 30 separate titles, so 1500 codes altogether - essentially this is simply a block of text strings, one per line, that are your current "stock" for these publications) each code includes on the DRM server details of the DocID it refers to and a usage count, typically 1 or 2 - this count specifies on how many devices the code can be used.

    So now we have 50 codes for DocID 123456 and another 50 for another DocID etc. We load the codes onto our web server (or you do this on your web server or third party server as explained in my last email) and then when the purchaser places an order for an item the cart system sends them a brief email, as you would for any product, but the email should include the next un-issued code from your stock for that particular DocID. We have template email instructions and you can see the basic idea: here - The user follows the instructions, and when they first open the file it asks for a code for that file. The user enters the code and it is checked on our DRM server to make sure it is valid for that particular file and has a usage count > 0. If it does, the DRM server tells the user's device that it is OK to view that file and decrements the usage count on the DRM server record for that code, so if it started as 2 it would then be 1 and if it was 1 it would go to 0 and could no longer be used - in fact if someone tries to use a code that has a count of 0 that too is logged for you to see.

    The above is the normal manner that publishers use the service - some publishers with only a few documents and small-scale sales issue the emails and codes manually, but most do so with an automated system of the kind I have previously described. Special facilities exist for dealing with courses that have many modules, common in many situations particularly in education and training - for example, it is possible to generate a block of codes for all 30 PDFs in a course set, where the text string for the code for each document is the same, e.g. abcdefghi, 123edf567 etc thus making it very simple for the end user and allowing for "bundle' products to be sold with a single code. Also note that codes can be disabled centrally and optionally reset to allow re-use (e.g. if a user changes device after a couple of years) and codes are NOT decryption keys - the files downloaded by end users remain encrypted even after authorization - this is because it is the DEVICE that is authorized to view the DocID in question, the file itself remains unaltered.

    Now, when the end user authorizes the file it creates an activity log record on our DRM server and you have full access to this for your publications and clients - various end user actions are logged in this way, together with the date, time, ipaddress, device information, doc information etc. There are many facilities available with this model and it works extremely well for PDF publications across all the main tech platforms because it is so simple, requires very little service management, and there are no software costs involved, just fees for service usage

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  • bluearrow E-commerce: Do I need special software or services to use the Offline DRM service to sell books, newletters, newspapers etc?
  • There are two main options: (i) accept orders via your existing e-commerce platform and then manually send an email to the customer with the authorization code they need for that file - this method is easy and ideal for small volume sales of one or two titles; or (ii) accept orders via some automated facility that send the emails out automatically, with the necessary authorization code included in the email. In this second scenario there are several options: (a) if your existing e-commerce system supports digital distribution with either "license codes" or "codes" etc then you can use that facility - for some e-commerce platforms this is a standard facility, for others it is available as a third-party add-ins or plug-ins, and for others it can be provided via a development using their toolsets and APIs (requires a developer of course); (b) there are several web-based services that specialize in providing digital distribution, including GetDPD, SendOwl, PayLoadz and others; (c) for PayPal-based sales we can provide a managed service which enables you to sell direct from your website or via a catalog page on our website, with all purchase receipts going direct to your PayPal account (there is no commission charge from us for this service, although we do charge a setup cost and monthly service subscription for codes and support)
  • bluearrow How do I send secured PDFs to end users?
  • Secure (drmz) files can be sent to end users in several ways. The recommended method for multiple files delivered to multple platforms (desktop, laptop and mobile) is to use catalogs. See the Documentation page for more details. For single files delivered to desktops/laptops, simple file attachments to an email or provision of the file on a hosting service is fine(e.g. a web site or service like Dropbox). If users have problems downloading files they can be placed in a zip file first and then users can download the zipped copy (of one or more files) and unzip the ones they require. All Javelin readers also include a built-in downloader, so this can be used and is often suitable for single file distribution to mobile devices, although we recommend using very simple URLs and filenames to avoid end user problems with typing in the URL. Note that once a drmz file is generated you can change its name without affecting the file or its authorization or documentID - e.g. to a short name with no spaces or special characters. See also the email and download template samles we provided here
  • bluearrow What watermarking options are provided?
  • PDF files can have a static watermark added to selected pages or all pages before converting to our secure offline format. A "tiled" watermark on every page adds a significant level of additional security to the source file. Dynamic watermarks are displayed on the PDF pages, as an overlay, if set when the secure files are created. The content of the default dynamic watermark can include fixed text plus fields such as the authorization code, deviceID, logged in username etc. For more details please see the DrumlinPublisher manual
  • bluearrow Do the Javelin readers support markup and annotation?
  • Yes, highlighting of text and adding of notes is supported for all platforms. However, because the PDF files are encrypted and remain encrypted they cannot be directly augmented with markup and annotation/notes, i.e. these elements are not stored within the secured PDF. Instead these elements are stored in separate files for each document, with pointers to where they should appear in the document. If the document is amended and re-issued or a new document provided with the same name but a different documentID, the elements 'may' no longer be available.
  • bluearrow How long should file conversions take?
  • Typically file conversion takes 1-2 seconds per file. Note that the source PDF file never leaves your site/is not uploaded to our DRM server, so remains secure on your site. Only metadata relating to the file is uploaded (e.g. your registered userID, the source PDF filename, the date/time of the conversion etc)
  • bluearrow Can I update an existing file I have issued and keep the same documentID?
  • Yes, you can augment previously issued files, with corrections and/or additions, as long as you ensure that the newly generated file has exactly the same PDF filename as the previous one
  • bluearrow Is there a limit on the number of PDF files I can convert? And can I bulk convert files if I have lots?
  • There is no limit on the number of files you can convert and there are bulk conversion facilities built into the DrumlinPublisher software (multi-file selection and conversion, plus folder-based multi-file selection)
  • bluearrow What filenames are accepted for conversion?
  • Ideally filenames should be as simple and concise as possible, avoiding the use of special characters such as symbols or accented characters or national variants, and using latin alphabet if possible. Files must be in standard PDF format and should not include Adobe-style protection
  • bluearrow What security features are provided as standard?
  • There are several elements to the security framework: (i) conversion of the source PDF to our secure 256-bit encryption formats; (ii) protection of the applications (Javelin readers) from hacking; (iii) control of access to documents on a device and/or user basis, with authorization code control as standard and license-based controls as optional for Corporate clients using the Windows platform; (iv) overlaid dynamic (optionally user-specific) watermarking; (v) usage tracking by user and document, including tracking of attempted misuse and of events such as printing and opening (Windows Pro editions of Javelin); (vi) all document handling takes place in memory so no insecure files are ever available on disk/permanent storage; (vii) https based hosting if we provide the hosting environment
  • bluearrow What are the pros and cons of Offline PDF security?
  • PROs:(i)strongly encrypted files; (ii) optional printing; (iii) high speed display, zooming and text searching; (iv) usage tracking including attempts at misuse; (v) available for use offline with no internet connectivity; easy use across multiple devices; CONs: (i) requires installation of proprietary PDF reader (Javelin); (ii) initial authorization requires brief internet connectivity (not required for Corporate users of Pro editions of the Windows reader)
  • bluearrow Can printing be enabled? And if so, what are the recommended settings?
  • Yes, printing can be enabled for desktop and laptop devices (Windows and OSX versions of Javelin) but we recommend it is only enabled if necessary - printing can be of all pages or a specified number of pages (i.e. across multiple print attempts) and can include static and dynamic watermarking. Double-sided printing is not supported. Protection is provided against attempts to print to non-physical devices (e.g.PDF and Image writers). We recommend that publishers set the Print Count to "unlimited" and then the Print pages count to the total number of pages they wish to allow the user to print. e.g. with a 100 page document printable twice, you might allow 200 or 250 pages to be printed. The reason for doing this is that an end user may print 1 page as a test, then decide to print 10 pages, then another 10 etc and that would be 3 print events, so if you set the print count to 3 they would no longer be able to print - also, many users have problems when printing, such as paper jams, running out of ink etc, so may have to print more times than you expect. Please see the documentation for guidance on all aspects including printing, available via the Documentation page on our website or directly here: https://www.drumlinsecurity.com/DrumlinPublisher.pdf - page 6 relates to printing. If a user has a problem because the print count has expired, then they can use the Javelin reader's File menu, Remove authorization option to clear their settings, and then re-open the document and re-enter a valid authorization code for that file, and they will have a new quota of printing based on the settings made for that file when it was generated
  • bluearrow My secured file is enabled for printing but I get a message saying I cannot print to the device I have specified?
  • Protection is provided against attempts to print to non-physical devices (e.g.PDF and Image writers). The software does this using a large list of known valid printers so it may be that the printer you are trying to use is not recognized, or that the operating system is trying to print to a "nominal" print device with a naming that is not a known printer or an in-network software service that may provide printing but is not a physical printer. In all these cases you can either (i) attach your device to a physical printer if that is possible; (ii) use another device, e.g. at home, which has a real printer attached; or (iii) ask the publisher if a printed copy is available; or (iv) use the file on a tablet device (i.e. portable) in lieu of being able to print. If necessary you can also use the File menu, Log file option tand then send us the log file to check. If the device details do indicate a genuine "new" printer device then we can enable this for you with a software update
  • bluearrow What prevents the end user providing the secured PDF and their authorization code to someone else to use?
  • When a secured PDF (drmz file) is authorized the file remains encrypted - it is the device that is enabled to view that specific file. If the authorization code has a usage count of 1 initially and the end user has authorized their file, the usage count available will be 0, so the code will no longer be valid. Sending the secured file and the authorization code to someone else to use will fail and any attempt to do this will be logged centrally and is available to publishers to check. If a license file rather than an authorization code has been provided to the end user, the file is unusable on any other device so again protects the secured PDF file from misuse
  • bluearrow Can I add my own branding to the Javelin viewer?
  • Branded versions of the Javelin3 and/or Javelin3Pro reader can be amended to provided a level of branding. Standard branding includes: branded/tailored opening screen; selectable toolbar elements; color selectable catalog header and background; branded icons in program including About form and catalogs; renamed program; bespoke installation kit. Excludes special requested developments and ongoing updates. Contact us for more details and a quotation and/or see the Pricing menu, One-time purchases
  • bluearrow Can I host the converted PDF for use on my own servers?
  • Yes, the drmz files are simply files that are available and encrypted. Links to drmz file can be protected, e.g. with secured links and/or by making them available behind an access control facility, but in general this is not necessary because the files always remain encrypted.
  • bluearrow If I take out a subscription what happens if I want to cancel or suspend my subscription?
  • Subscriptions are monthly (or can be paid for annually in advance) and can be cancelled at any time. Document details for publications that have been generated and issued to end users will be retained and supported
  • bluearrow Can I change my subscription (upgrade or downgrade the service level)?
  • You can change your subscription at any time - simply take out a new subscription using the same email address as before to replace your current subscription service level, or use a new email address to create an additonal (new) subscription and then cancel the previous subscription via PayPal, Worldpay or contact us to cancel your old subscription on your behalf
  • bluearrow My customer is using a current version of Javelin but cannot access the service - what is the problem?
  • The probability is that their network is blocking access to or from our DRM server. Please see the Help on common issues, item 2, for details on how to resolve this