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    • 6. 发明授权
    • Persistent data storage for client computer software programs
    • 客户端计算机软件程序的持久数据存储
    • US06691113B1
    • 2004-02-10
    • US09672713
    • 2000-09-28
    • Benjamin R. HarrisonDavid A. KranzMurray S. MazerSpiro MichaylovCarl A. Soeder
    • Benjamin R. HarrisonDavid A. KranzMurray S. MazerSpiro MichaylovCarl A. Soeder
    • G06F1730
    • G06F21/52G06F17/30887G06F21/62Y10S707/99939
    • Persistent data storage for client computer software programs is provided using a repository that enables client computer software programs to store data securely on a client computer system, subsequently retrieve that data, and optionally share the data in a controlled fashion with authorized client computer software programs. The present invention can be used by both trusted and untrusted client computer software programs that either reside locally on the client computer system or are downloaded from a server computer system. A benefit of the present invention is that it allows untrusted applets to have access to persistent storage without compromising the integrity of the client computer system. Since the present invention controls persistent storage space, not the programmer of the client computer software program, the burden of insuring storage integrity and security is removed from the programmer. In addition to basic integrity and security features, the present invention provides automatic data format conversion for client computer software programs reading/writing data in the data repository, a commit operation to force in-memory repository data to disk, and automatic expiration to delete the repository after a predetermined time period. The repository can be pre-limited to a maximum size and shared among multiple client computer software programs.
    • 使用存储库提供用于客户端计算机软件程序的持久数据存储,其使客户端计算机软件程序能够在客户端计算机系统上安全地存储数据,随后检索该数据,并且可选地以授权的客户端计算机软件程序以受控的方式共享数据。 本发明可以由可信任的和不可信的客户端计算机软件程序使用,客户端计算机软件程序本地存在于客户端计算机系统上,或者从服务器计算机系统下载。 本发明的优点在于它允许不受信任的小应用程序访问持久存储,而不会影响客户端计算机系统的完整性。 由于本发明控制持久存储空间,而不是客户端计算机软件程序的编程者,从程序员中消除了确保存储完整性和安全性的负担。 除了基本的完整性和安全性特征之外,本发明还提供了用于在数据存储库中读/写数据的客户端计算机软件程序的自动数据格式转换,强制存储器内存储库数据到磁盘的提交操作,以及自动到期以删除 存储库在预定时间段之后。 存储库可以预先限制为最大大小,并在多个客户端计算机软件程序之间共享。