ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,549,355, issued on Feb. 10, was assigned to Dell Products LP (Round Rock, Texas).

"Scalable assured delete with AONT" was invented by Alan Barnett (County Cork, Ireland), Aidan O'Mahony (Cork, Ireland) and Dale R. Bremner (Wrentham, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "One example method includes identifying a dataset, which may be a backup dataset, that has been subjected to a mix&slice process, identifying a cryptographic key that was used to encrypt the dataset, randomly selecting, from the backup dataset, a portion of the dataset, randomly applying writes to the portion of the dataset, and deleting the cryptographic key. The dataset ...