Repeated data deletion method and device

• Main Authors: ZHONG YANHUI, YU JIAN
• Format: Patent
• Language: English
• Published: 11.03.2015
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

An embodiment of the invention discloses a repeated data deletion method and device. The repeated data deletion method includes dividing received initial data into blocks; obtaining the fingerprint of each data block; generating a first check value of the initial data according to the fingerprint of each data block; searching and deleting the repeated data block in the initial data; storing the unique block after repeated data block deletion; generating a second check value after repeated data deletion by use of the generation mode as same as that of the first check value according to the fingerprint of the unique block; comparing the first check value and the second check value, determining that the initial data have been subject to correct repeated data deletion when the first check value is identical to the second check value. The repeated data deletion method and device can ensure data accuracy during repeated data deletion.