Have you ever needed to sign AWS S3 links in Salesforce? If you are here - it seems the answer is yes. For those of you who are not sure why you need an S3 links signing - I’m sure that you heard at least once in the IT news about some big company’s data that was leaked from their cloud. Most of the time it’s because they did not configure the public access to their buckets properly, in case they are using AWS S3.