Hello.. I just got a email with the above (subject).
The email explains (and I want to confirm hikashop is up to date with this):
As you may be aware, an Internet-wide security issue, commonly referred to as POODLE, has been identified in the last two weeks and affects anyone using older Web browsers that use SSL version 3 (SSLv3), specifically Internet Explorer (IE) 6. This issue creates a vulnerability that could allow hackers to gain access to any connection using this outdated Web browser.
Authorize.Net itself is not vulnerable to POODLE, but we are making changes to our systems to assure that we are providing our merchants and their customers with the highest degree of security possible.
To that end, on November 4, 2014, we will be disabling the use of SSLv3 within our systems. This means that if your website or shopping cart solution uses SSLv3 to send transactions to Authorize.Net, you will no longer be able to process transactions. You will also no longer be able to access any secure Authorize.Net pages from IE6.
We expect that a minimal number of our merchants will be affected. However, because we do not control how your particular site or solution sends transactions to us, this change could potentially impact your transaction processing. Please immediately contact your web developer or shopping cart solution to see if you will need to make any changes to your site or solution before November 4th
Many thanks.