ALEXANDRIA, Va. (8/15/11)--The National Credit Union Administration (NCUA) warned credit unions that RSA SecurID tokens that were issued before April 2011 should be replaced, adding that additional steps should be taken "to safeguard the servers that support the RSA authentication process." The NCUA said that RSA's SecurID authentication process may have been compromised during a March 18 security breach of that company's systems. The NCUA security alert was released late last week following a National Security Agency risk alert. RSA is the security division of EMC Corp. RSA's SecurID process provides two-factor authentication for online and internal network computer systems. One of those factors is an individual, separately generated password or personal identification number, paired with a second form of authentication. According to RSA, this two-step authentication provides "a much more reliable level of user authentication than reusable passwords." RSA security services are used by many high value companies. For the full NCUA alert, use the resource link.