Shared Access Signatures

…more details to come…

A Shared Access Signature is an HMAC computed value that includes a expiration date and is base 64 encoded that can only be created with a primary or secondary access key from a device that is sent as a security field.

There are three steps to create your shared access signature

1. Build up the raw string that will be signed with your primary or secondary access key

DeviceId + '\n'
DateStampAsPresentedInMessage + '\n'

2. Sign the string with your primary or secondary access key

3. Create a string containing your signature that will be sent as a security field.