In an effort to maintain the highest levels of security for all server-to-server communications with the Authorize.Net platform (both transactional and otherwise), we will be ending support for 3-DES cipher suites in the sandbox on July 30, 2016.
Specifically, we will be ending support for the cipher, TLS_RSA_WITH_3DES_EDE_CBC_SHA, also known as DES-CBC3-SHA or Cipher 0x0a.
We will announce a date for disabling 3-DES ciphers in Production, at a later time.
If you have a solution that relies on 3-DES ciphers to communicate with our servers, please update it to a current, high-security cipher as soon as possible. Please review our API best practices blog post for more information.
