Tag: security

Privacy Pioneer Promises Secure VOIP

LAS VEGASPhil Zimmermann, the celebrated cryptographer who created PGP (Pretty Good Privacy) for e-mail encryption, is taking a shot at securing VOIP communications. Zimmermann took the stage at the Black Hat Briefings here to show off Zfone, a prototype application that encrypts voice-over-IP calls to thwart man-in-the-middle eavesdroppers. Using the open-source, cross-platform softphone Shtoom and

Wireless Network Concern

Now more and more network build by wireless equipments. There are still something concern. 1) What is the range of wireless? Types of Wi-Fi Network Protocol Maximum Speed Average Speed Wireless Range 802.11a 54Mbps 27Mbps 12m indoors, 30m line-of-sight outdoors 802.11b 11Mbps 4.5Mbps 30m indoors, 120m line-of-sight outdoors 802.11g 54Mbps 7Mbps (in compatibility mode), 16Mbps