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Implementation
of mechanisms such as encryption that
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prevent
the preservation of content by a trusted repository.
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Preservation
of the digital content requires replicating it on
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new
media, migrating and normalizing it in the face of
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changing
technology. Protection mechanisms
may also
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prevent
the dissemination of content to authorized users.
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Exploitation
of technical protection mechanisms is
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generally
optional; their use depends on how a format is
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used
in a particular context.
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Examples:
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Sound
recordings from Audible.com will only play with software
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and/or
devices from Audible
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– |
MP3
files play anywhere
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