This article is for those who want to fix the The Request Must Contain The Parameter Signature error that they may be experiencing as of August 15, 2009. It addresses those who use AWS REST requests within PHP files.
The Request Must Contain The Parameter Signature: Amazon Web Services Error and Quick Solution
For all of those out there who are receiving the “The request must contain the parameter Signature” error from Amazon Web Services, this document presents the solution for those who use REST requests to Amazon Web Services.