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Securing Internet Telephony: Encrypting Voice With VoIP-Over-VPN

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Executive Summary

Voice over Internet Protocol (VoIP) offers tremendous cost-savings for the enterprise by means of reduced or eliminated telephony charges, consolidated network architectures, and reduced network operations and maintenance overhead. As with any new technology, however, there can be a down-side. Most VoIP gateways compromise communication security by transporting VoIP and data traffic over public networks without encryption, making the information susceptible to interception by snoopers, hackers, and so forth. Because of such security concerns, enterprises that handle highly-sensitive information (such as financial, government, and military institutions) have been reluctant to cash in on the benefits of deploying a VoIP system.

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