Prefer authorize.net certified developer
Need assistance with authorize.net updated security below
1. ... b.Additionally, please make sure that your solution does not restrict any Authorize.Net ID field to
10 characters. If you are required to define a character limit when storing any of our IDs, the limit
should be no less than 20 characters
3.RC4 Cipher Disablement
For now, if you have a solution that relies on RC4 to communicate with our servers, please update
it to a current, high-security cipher as soon as possible.