We are required by credit card processing companies to ensure proper data encryption. Otherwise, they do not allow us to accept payment and subsequently we would no longer be able to offer access to the Silhouette Design Store.
However, it is not just credit card information that is potentially vulnerable and in need of protection. It also includes things like your username and password each time you log in. For users who may share the same password for other websites and accounts, this unlocks the door for a hacker to gain access to other accounts that they use apart from the Silhouette Design Store.