Adobe has a bunch of rights management tools for encrypted PDFs. These can also be integrated into a Flash/Flex application that could provide the locking you desire.
Generally, if you want to lock a piece of content to a device, you need some cooperation from the device firmware. The Nook and the Kindle have this capability I believe, but you'll need to use their protections schemes to take advantage of it. I'm not sure about other devices.
用于内容保护的 OMA drm 定义了机器绑定协议。您也可以实现自己的 drm 解决方案，但问题是阅读器将如何与您的应用程序绑定？在这种情况下，您需要提出阅读器集成解决方案。我希望你明白这一点。
OMA drm for content protection defines protocol for machine binding. Also you can implement your own drm solution but problem will be how will the reader bind with your application? In that case you need to come up with the reader integrated solution. I hope you get the point.
Well you can pay a visit to EditionGuard for economic way of Adobe DRM on eBooks. EditionGuard is a PaaS and subscription based. And they also have API for ingtegration to sells website.
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Adobe 有一系列用于加密 PDF 的权限管理工具。这些还可以集成到 Flash/Flex 应用程序中，提供您所需的锁定。
Mobi 也允许 DRM（并且有很好的工具来生成它） http ://www.mobipocket.com/en/DownloadSoft/default.asp?Language=EN
据我所知，没有一个简单的解决方案可以将内容锁定到单个设备。
Adobe has a bunch of rights management tools for encrypted PDFs. These can also be integrated into a Flash/Flex application that could provide the locking you desire.
Mobi allows for DRM as well (and have great tools for producing it) http://www.mobipocket.com/en/DownloadSoft/default.asp?Language=EN
AFAIK there isn't an easy solution for locking content to a single device.
一般来说，如果你想将一段内容锁定到设备上，就需要设备固件的一些配合。我相信 Nook 和 Kindle 具有此功能，但您需要使用它们的保护方案才能利用它。我不确定其他设备。
Generally, if you want to lock a piece of content to a device, you need some cooperation from the device firmware. The Nook and the Kindle have this capability I believe, but you'll need to use their protections schemes to take advantage of it. I'm not sure about other devices.
用于内容保护的 OMA drm 定义了机器绑定协议。您也可以实现自己的 drm 解决方案，但问题是阅读器将如何与您的应用程序绑定？在这种情况下，您需要提出阅读器集成解决方案。我希望你明白这一点。
OMA drm for content protection defines protocol for machine binding. Also you can implement your own drm solution but problem will be how will the reader bind with your application? In that case you need to come up with the reader integrated solution. I hope you get the point.
那么您可以访问 EditionGuard 以经济的方式在电子书上使用 Adobe DRM。 EditionGuard 是一个 PaaS，基于订阅。他们还有用于集成销售网站的 API。
Well you can pay a visit to EditionGuard for economic way of Adobe DRM on eBooks. EditionGuard is a PaaS and subscription based. And they also have API for ingtegration to sells website.