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Quest Authentication Services (formerly Vintela Authentication Services) is patented technology that empowers organizations to address many of the compliance and security concerns with heterogeneous enterprises and Unix/Linux/Mac authentication mechanisms. The product provides a robust scalable alternative to NIS, allowing Unix and Linux systems and applications to enjoy the secure and compliant Kerberos and LDAP authentication offered by Active Directory. In addition, through directory consolidation and advanced identity administration capabilities, many of the internal and regulatory concerns presented by multiple, disparate identity stores, identities, and authentication mechanisms can be eliminated.