topic Re: QVD encryption in QlikView https://community.qlik.com/t5/QlikView/QVD-encryption/m-p/943986#M325288 <HTML><HEAD></HEAD><BODY><P>The posts included in Bill Markhams response are very useful - as you have seen, the short answer is not but here is some inforamtion regarding the layout</P><H1><A name="kanchor941"></A>QVD Files</H1><P>A QVD (QlikView Data) file is a file containing a table of data exported from QlikView. QVD is a native QlikView format and can only be written to and read by QlikView. The file format is optimized for speed when reading data from a QlikView script but it is still very compact. Reading data from a QVD file is typically 10-100 times faster than reading from other data sources. </P><P>QVD files can be read in two modes, standard (fast) and super-fast. The selected mode is determined automatically by the QlikView script engine. Super-fast mode can be utilized only when all fields or a subset thereof are read without any transformations (formulas acting upon the fields), though the renaming of fields is allowed. </P><P></P><P>A QVD file holds exactly one data table and consists of three parts:</P><OL><LI>A well formed XML header (in UTF-8 char set) describing the fields in the table, the layout of the subsequent information and some other meta-data. </LI><LI>Symbol tables in a byte stuffed format. </LI><LI>Actual table data in a bit-stuffed format. </LI></OL><H2></H2></BODY></HTML> Wed, 16 Dec 2015 20:23:32 GMT 2015-12-16T20:23:32Z QVD encryption https://community.qlik.com/t5/QlikView/QVD-encryption/m-p/943983#M325285 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I would like to know if Qlik uses any especial algorithm to encrypt the QVD data.</P><P></P><P>Thank you in advance.</P><P></P><P>Best Regards,</P><P></P><P>- Karla</P></BODY></HTML> Wed, 16 Dec 2015 19:46:54 GMT https://community.qlik.com/t5/QlikView/QVD-encryption/m-p/943983#M325285 Anonymous 2015-12-16T19:46:54Z Re: QVD encryption https://community.qlik.com/t5/QlikView/QVD-encryption/m-p/943984#M325286 <HTML><HEAD></HEAD><BODY><P>I saw this a couple of weeks ago, but have not tried it.</P><P></P><P><A href="https://community.qlik.com/docs/DOC-14257">Encrypt and Decrypt data in QVD</A></P><P></P><P></P><P>Most people rely on NTFS permissions to the QVD files to prevent sticky fingers getting to them.</P></BODY></HTML> Wed, 16 Dec 2015 19:56:55 GMT https://community.qlik.com/t5/QlikView/QVD-encryption/m-p/943984#M325286 Anonymous 2015-12-16T19:56:55Z Re: QVD encryption https://community.qlik.com/t5/QlikView/QVD-encryption/m-p/943985#M325287 <HTML><HEAD></HEAD><BODY><P class="">The short answer is: no. QVD:s are not encrypted.</P></BODY></HTML> Wed, 16 Dec 2015 19:59:36 GMT https://community.qlik.com/t5/QlikView/QVD-encryption/m-p/943985#M325287 henrikalmen 2015-12-16T19:59:36Z Re: QVD encryption https://community.qlik.com/t5/QlikView/QVD-encryption/m-p/943986#M325288 <HTML><HEAD></HEAD><BODY><P>The posts included in Bill Markhams response are very useful - as you have seen, the short answer is not but here is some inforamtion regarding the layout</P><H1><A name="kanchor941"></A>QVD Files</H1><P>A QVD (QlikView Data) file is a file containing a table of data exported from QlikView. QVD is a native QlikView format and can only be written to and read by QlikView. The file format is optimized for speed when reading data from a QlikView script but it is still very compact. Reading data from a QVD file is typically 10-100 times faster than reading from other data sources. </P><P>QVD files can be read in two modes, standard (fast) and super-fast. The selected mode is determined automatically by the QlikView script engine. Super-fast mode can be utilized only when all fields or a subset thereof are read without any transformations (formulas acting upon the fields), though the renaming of fields is allowed. </P><P></P><P>A QVD file holds exactly one data table and consists of three parts:</P><OL><LI>A well formed XML header (in UTF-8 char set) describing the fields in the table, the layout of the subsequent information and some other meta-data. </LI><LI>Symbol tables in a byte stuffed format. </LI><LI>Actual table data in a bit-stuffed format. </LI></OL><H2></H2></BODY></HTML> Wed, 16 Dec 2015 20:23:32 GMT https://community.qlik.com/t5/QlikView/QVD-encryption/m-p/943986#M325288 2015-12-16T20:23:32Z