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Recent security innovations include all but the following _____. retina scanning password fingerprint scanning voice recognition

User Ishmael
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2 Answers

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Passwords have existed for centuries for passage through places as a means of security.

User Rodamn
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I think that it would be "password" because the other choices all involve recent innovations that are more intricate and complex than just a password.
User Klitos Kyriacou
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