duplicate keys

duplicate keys

Identical key data in a file. Primary keys, such as account number cannot be duplicated, since no two customers or employees should be assigned the same number. Secondary keys, such as date, product and city, may be duplicated in the file or database.
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References in classic literature ?
A man like Larsan, or Ballmeyer, could have had made duplicate keys. As to the documents, I think Larsan had not intended to steal them, at first.
And so the Ship of Fools sailed on, all aft fooling and befouling, from the guileless-eyed, gentle-souled Finnish mate, who, with the scent of treasure pungent in his nostrils, with a duplicate key stole the ship's daily position from Captain Doane's locked desk, to Ah Moy, the cook, who kept Kwaque at a distance and never whispered warning to the others of the risk they ran from continual contact with the carrier of the terrible disease.
I have got a duplicate key -- I always insist on a duplicate key of the place where she keeps her account books.
In vain the doors of the upper entry had been locked; the ghost either carried a duplicate key in its pocket, or availed itself of a ghost's immemorial privilege of coming through the keyhole, and promenaded as before, with a freedom that was alarming.
"The police imagine, I take it, that this Fitzroy Simpson, having drugged the lad, and having in some way obtained a duplicate key, opened the stable door and took out the horse, with the intention, apparently, of kidnapping him altogether.
You are to leave the keys on coming away in the main hall of the house, where the proprietor may get them on his entering the house by means of his duplicate key.
The office was locked for a few days when they got the duplicate keys of the office and waited for the right opportunity.
Since the car was a centrally locked one, even a key smith who was called immediately couldn't open the car and duplicate keys on the spot.
The lock is supplied with a single key which prevents duplicate keys falling into other workers hands reducing the likelihood of the padlock being removed by another worker.
Armed with new logbooks they got duplicate keys from dealers, London's Southwark Crown Court was told.
Dubai: The Criminal Investigation Department (CID) of Dubai Police has arrested a former worker of a restaurant in Deira City Centre for allegedly stealing money from the office safe using duplicate keys.