The conversion could cost even more if the various technologies developed for functions such as encryption and compression are not compatible with each other.

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They foresee such applications as encryption, precise navigation and fast object recognition.

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Unlike some other mail encryption utilities such as SigabaSecure, introduced last week, Disappearing Email doesn't attempt to authenticate the recipient's identity.

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For best protection, Ozancin recommends two-factor authentication3: adding an additional security mechanism to the password one such as a smart card or an encryption key pair.

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Until October, when the relevant section of DMCA goes into effect, the use of an encryption circumvention device such as DeCSS is not illegal, only distribution or trafficking in such devices, she said.

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