SSO encryption

 1. If you dont  have Master Secret Server Back up , you will Have to do fresh Install : Complete Install of BizTalk from scratch, No There is No other way.

Dont forget to take Master Secret key back up if you change Admin Password or Single Sign On Service Password

Log Name:      Application
Source:        ENTSSO
Date:          6/15/2012 3:28:40 AM
Event ID:      10536
Task Category: Enterprise Single Sign-On
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      ComputerName
Description:
SSO AUDIT
 Function: GetConfigInfo ({68A2F2B6-6A66-42DC-AF81-36A6349BB72B})
 Tracking ID: 14ca694f-e7c8-4df9-bc16-3a79f4e1a198
 Client Computer: ComputerName (BTSNTSvc64.exe:2336)
 Client User: ComputerName\Servicename
 Application Name: {444691BA-A7BC-457D-AF34-38881A1CDBED}
 Error Code: 0xC0002A1F, Cannot perform encryption or decryption because the secret is not available from the master secret server. See the event log for related errors.

Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="ENTSSO" />
    <EventID Qualifiers="32768">10536</EventID>
    <Level>3</Level>
    <Task>1</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2012-06-15T10:28:40.000000000Z" />
    <EventRecordID>14092</EventRecordID>
    <Channel>Application</Channel>
    <Computer>ComputerName</Computer>
    <Security />
  </System>
  <EventData>
    <Data>GetConfigInfo ({68A2F2B6-6A66-42DC-AF81-36A6349BB72B})</Data>
    <Data>14ca694f-e7c8-4df9-bc16-3a79f4e1a198</Data>
    <Data>ComputerName (BTSNTSvc64.exe:2336)</Data>
    <Data>ComputerName\Servicename</Data>
    <Data>{444691BA-A7BC-457D-AF34-38881A1CDBED}</Data>
    <Data>0xC0002A1F, Cannot perform encryption or decryption because the secret is not available from the master secret server. See the event log for related errors.
</Data>
  </EventData>
</Event>