Proofpoint, Inc., a provider of unified email security, email archiving, and data loss prevention solutions, introduced a new version of Proofpoint ARCHIVE, Proofpoint's SaaS email archiving solution. Part of the Proofpoint on Demand suite of cloud-based email security and compliance solutions, Proofpoint ARCHIVE allows organizations to archive email and deal with storage management, legal discovery, and regulatory compliance. The company also announced that the DoubleBlind Encryption technology used in Proofpoint ARCHIVE has been granted US patent. Using DoubleBlind Encryption technology, all data stored in the Proofpoint ARCHIVE hosted datacenters is encrypted by a key held only by the customer. Policy engine enhancements - support for indefinite email retention periods and more granular control of archiving policies.