def generate_request_access_signature(parameters, secret_key):
<EOL>keys = parameters.keys()<EOL>keys.sort()<EOL>encoded_pairs = [urlencode({key: parameters[key]}) for key in keys]<EOL>serialized_parameters = '<STR_LIT:&>'.join(encoded_pairs)<EOL>string_to_hash = '<STR_LIT>' % (secret_key, serialized_parameters)<EOL>return sha256(string_to_hash).hexdigest()<EOL>
Generate the parameter signature used during third party access requests