Thanks Igor, So if the data is indexed prior to the encryption step, does SQLite manage that index internally as a Btree that s stored somewhere? Is it part of the MASTER database?
Obviously there would be a security issue if the index is accessible as per this: http://blogs.msdn.com/lcris/archive/2005/12/22/506931.aspx If I am storing CC# or SS#, the index would contain them yes? Igor Tandetnik <[EMAIL PROTECTED]> wrote: Derek Developer wrote: > Thank you for your replys, but I am still not sure I understand how a > Query is executed on (page) encrypted data wihout either indexing the > data prior to encrption, creating a secondary hash column of the data > or simply decrypting every page to get at the underlying data? The data _is_ indexed prior to encryption (assuming you did create an index on the appropriate column, of course), then the pages containing the index are themselves encrypted when written to the file (and decrypted when read back, of course). Encryption is built into the I/O. Whenever a page-worth of data is read from disk, it is decrypted right afterwards. When a page is written, it's encrypted right before. The I/O engine doesn't care what kind of data is on that page - it's only concerned about shuffling bytes in and out of storage. The database engine doesn't care whether the file is encrypted or not - it always gets plaintext pages from I/O subsystem. Igor Tandetnik _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
