English Lexicon

Digital key

/ˈdɪdʒɪtəl kiː/
nounCEFR B2 (Upper)Top #4500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    An electronic credential stored on a smartphone or wearable device that allows a user to unlock, lock, and start a vehicle or access a secure building.

    "He used his digital key on his phone to open the front door of the apartment."
  2. 2

    A cryptographic code or software token used to authenticate a user or decrypt secure digital data.

    "The software requires a valid digital key before authorizing the installation."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the combination of 'digital' (from Latin 'digitalis', pertaining to fingers or digits, later generalized to electronic data) and 'key' (from Old English 'cǣg', an instrument used for locking or unlocking). The compound term emerged in the late 20th century with the advent of cryptographic systems and has gained widespread prominence in modern cybersecurity and smart device integration.

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