Encryption Type in Microsoft Excel 2013 (XLS file)

Hello,
I am creating a password protected file of format Excel 97-2003 Workbook (.xls) using Microsoft Office 2013.
I have written a java program to read password protected excel file using POI API. I am able to read .xlsx file using this API, but I am not able to read .xls file. It throw error : org.apache.poi.hssf.record.RecordFormatException: Unknown encryption
info 4
Using same java code I am able to read .xls file if I use Microsoft Office 2010 to create this file.
As per POI API documentation:
Apache POI contains support for reading few variants of encrypted office files:
XLS - RC4 Encryption
XML-based formats (XLSX, DOCX and etc) - AES and Agile Encryption
I think in Microsoft Office 2013, encryption type has been change for XLS file. So I want to know that how can I solve this issue. Also please let me know how to configure Encryption Type in Microsoft Excel 2013 Excel file.
OS is Windows 8(64-bit).
Thanks
Vishal

Hi,
Please see the article and check if it is helpful:
https://issues.apache.org/bugzilla/show_bug.cgi?id=35897
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
This is the forum to discuss questions and feedback for Microsoft Excel, the issue is more related to Office/Java develop, I recommend you connect the POI provide to get more help.
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
George Zhao
TechNet Community Support
It's recommended to download and install
Configuration Analyzer Tool (OffCAT), which is developed by Microsoft Support teams. Once the tool is installed, you can run it at any time to scan for hundreds of known issues in Office
programs.

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Encryption Type in Microsoft Excel 2013 (XLS file)

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