The contents of the entire modifiers part of request string, including the optional lock suffix may be obscured by applying standard base64 encoding.
The server attempts to decode if attribute::RequestObfuscation is set. If decoding fails, the request is rejected. If both request locking and request obfuscation are applied, the lock suffix must be generated and appended before base64 encoding.
http://server/myTemplate?$txt=my text string&$img=myImage
Any occurrences of '=', '&', and '%' in value strings must be escaped using '%xx' encoding, before the request is obfuscated. It is not necessary to otherwise http-encode the modifiers part of the request either before or after obfuscation, even if request locking is applied, since base64 encoding is safe for http transmission.