Recent Comments

Comment RSS

MobileNoter SSL Certificate Validation

Thursday, 10/08/2009, 05:33 PM by Vitaly Gorn

We periodically receive bug reports that Sync Client was not able to connect to the server because of invalid SSL certificate. This is a rare error, but it continues repeating, so I decided to write a blog post about it.

Some new users may receive the following error when they start using MobileNoter Windows Sync Client:

System.ServiceModel.Security.SecurityNegotiationException: Could not establish trust relationship for the SSL/TLS secure channel with authority ''. --->
System.Net.WebException: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. --->
System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.

This means that certificate that was issued for is invalid on your local machine. The reason it is invald is that Certification Authority that issued our certificate (GoDaddy) is not listed as Trusted Certificate Authority on your machine.

I'm not sure why this happens. GoDaddy are Trusted CA starting from 2004, and I believe they are being listed as Trusted CA in default Windows configuration for a long time. The only guess is that their certificate is removed either manually or by some software on particular machines.

To fix the problem, you have to install GoDaddy CA Root certificate.


10/5/2009 4:11:18 PM #

Hello Vitaly,

Thanks for making this useful post. I am one of the people who had this problem (you might remember me from our email exchanges Smile).

If anyone else is having this problem, you can install the GoDaddy CA Root certificate from their website:

Once I did that, I've not had a SSL certificate error since.

Thanks to Vitaly again for all his help!

Feature requests:
1. Proxy support (automatic like Google Calendar Sync)
2. Support for OneNote's Outlook Task synchronization feature
3. Minimize/Maximize section by clicking section name. Minimize/Maximize all sections.
4. Edit/formatting options
5. Evernote features like snapshot/camera, audio support
6. Search. Also search through Spotlight
7. Email pages/sections

Waseem |

10/11/2009 2:15:48 AM #

nice post, a very informative and a great post provided i might add, i seriously want to take a moment here and thank you for providing your ideas related to the SSL certificate validation of  MobileNoter. Keep posting.

forex reviews |

10/20/2009 3:22:01 PM #

I don't like the idea at all that my OneNote is being secretly uploaded to your website. There is no privacy policy and you are not any well known company. I would get this app ONLY if there was an option of my notes getting uploaded anywhere.

aa |

10/22/2009 5:10:12 PM #

We understand this. Now it is possible to sync only via web service, but we will provide more options for users who require higher level of security. Security is hight priority for us. There will be encryption of user data using a user defined key (your data still will be synced via the server, but it will be encrypted using your key, that is not transmitted anywhere). We also working on the Wi-Fi version that can sync without the server.

Vitaly |

Comments are closed