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    • 2. 发明申请
    • Method and system for file downloads to portable computing devices
    • 文件下载到便携式计算设备的方法和系统
    • US20050076214A1
    • 2005-04-07
    • US10678936
    • 2003-10-03
    • David ThomasEdward PerrySujata BanerjeePuneet SharmaAmy DalalSung-Ju Lee
    • David ThomasEdward PerrySujata BanerjeePuneet SharmaAmy DalalSung-Ju Lee
    • G06F12/14G06F21/00G06F17/60
    • G06F21/10
    • The present disclosure allows for the downloading of large digital media files in a progressive manner by allowing for a transfer of such digital media to occur over various sessions. A file server is described that receives a request to transmit a file whereupon the file server locates such requested file in its memory. For verification purposes a unique identifier is computed for the requested file such as an MD5 checksum of the digital file. Thereafter an encryption key, K1, is chosen. Using a second key, K2, the first key and the unique identifier are encrypted, and the requested file is encrypted using the first key. Both these encrypted values are then transmitted. Subsequently, for example, after payment is received, an unencrypted form of the first key is also transmitted. The first key can then be used to decrypt the requested file to unlock full functionality of the requested file.
    • 本公开允许通过允许这样的数字媒体的传送在各种会话上发生而以渐进的方式下载大型数字媒体文件。 描述了一种文件服务器,其接收传送文件的请求,因此文件服务器将这样的请求的文件定位在其存储器中。 为验证目的,为所请求的文件计算唯一的标识符,例如数字文件的MD5校验和。 此后选择加密密钥K1。 使用第二个键,K2,第一个键和唯一标识符被加密,并且使用第一个密钥加密所请求的文件。 然后传输这两个加密值。 随后,例如,在接收到支付之后,还发送第一密钥的未加密形式。 然后可以使用第一个密钥来解密所请求的文件,以解锁所请求文件的完整功能。
    • 10. 发明授权
    • Cache management system
    • 缓存管理系统
    • US07953934B2
    • 2011-05-31
    • US12634397
    • 2009-12-09
    • David ThomasScott Wells
    • David ThomasScott Wells
    • G06F12/00G06F13/00
    • G06F12/0866G06F12/123G06F17/30902G06F2212/264G06F2212/465H04L67/2842
    • Embodiments disclosed herein provide a cache management system comprising a cache and a cache manager that can poll cached assets at different frequencies based on their relative activity status and independent of other applications. In one embodiment, the cache manager may maintain one or more lists, each corresponding to a polling layer associated with a particular polling schedule or frequency. Cached assets may be added to or removed from a list or they may be promoted or demoted to a different list, thereby changing their polling frequency. By polling less active files at a lower frequency than more active files, significant system resources can be saved, thereby increasing overall system speed and performance. Additionally, because a cache manager according to embodiments disclosed herein does not require detailed contextual information about the files that it is managing, such a cache manager can be easily implemented with any cache.
    • 本文公开的实施例提供了一种高速缓存管理系统,其包括高速缓存和高速缓存管理器,其可以基于其相对活动状态并且独立于其他应用来以不同频率轮询缓存资产。 在一个实施例中,高速缓存管理器可以维护一个或多个列表,每个列表对应于与特定轮询时间表或频率相关联的轮询层。 缓存的资产可以添加到列表中或从列表中移除,或者可以升级或降级到不同的列表,从而改变其轮询频率。 通过以比更多活动文件更低的频率轮询较少的活动文件,可以节省大量系统资源,从而提高整体系统速度和性能。 此外,由于根据本文公开的实施例的高速缓存管理器不需要关于其正在管理的文件的详细上下文信息,所以可以使用任何高速缓存来容易地实现高速缓存管理器。