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With this product , PIN authentication , encryption / decryption and other security functions , and PINs and license keys and other security-related information is all stored in the hardware tamper-resistant module * 3 , in the same way as conventional Secure MultiMediaCards . Using Redirect messages on , for example , a wireless link without link level encryption / authentication is particularly hazardous because the link is open to eavesdroppring and packet injection . Even in an " age of abundance " , there will probably be goods and services ( such as psychoactive substances , birth control , encryption / MP3s / other information technology , weapons , sexual experiences ) that are strongly desired by individuals but prohibited by politicians and / or moralists . I am sure they used a simple password protection scheme ( htpass ) without any form of encryption / SSL . The users would hit the basically secured wireless LAN ( encryption / keys ) and then access our corporate systems with their existing client VPN software .