| 摘要 |
A processing device is configured to maintain counters for respective stored data blocks, and to encrypt a given one of the data blocks utilizing a value of the data block in combination with a value of its associated counter. The encryption may comprise a homomorphic encryption operation performed on the given data block as a function of the value of that data block and the value of its associated counter, with the homomorphic encryption operation comprising an operation such as addition or multiplication performed over a designated field. A given one of the counters is incremented each time the corresponding data block is subject to an update operation. The data block can be encrypted, for example, by combining a value of that data block with an additional value determined using the associated counter value, such as a one-time pad value determined as a function of the counter value. |
