Forum Thread: Can I View File Without Signature?

I'v been looking around the website with f12 (developer tool) and found some jpg link.
And the links are consist of key-pair-id, policy and signature.
After little search found that those link element was associated with AWS(Amazon Web Service)
But I get error when I enter the link to view the file
"This XML file does not appear to have any style information associated with it. The document tree is shown below."
<Error>
<Code>MissingSignature</Code>
<Message>Missing Signature query parameter or cookie value</Message>
</Error>
I think this is because of missingsignature wich file host did not apply signature to link....
Anybody know how to view file without signature?