| 摘要 |
<p>The invention relates to a computer-implemented method for storing an object that comprises providing (S10) an object, an ordering vector of the object, the ordering vector being associated to a lexicographic order having at least one dimension, and base keys associated to each dimension of the lexicographic order. The method also comprises deriving (S20) a key by firstly retrieving (S210) the base key associated to the first dimension of the lexicographic order for which the ordering vector has a value different from the smallest value, and, lastly applying (S240) a one way function a number of times corresponding to the value of the vector for the first dimension for which the ordering vector has a different value from the smallest value, or a number of times corresponding to the value of the vector for the last dimension of the order. The method then comprises encrypting (S30) the object with the key, and storing (S40) the object as encrypted. Such a system improves the secure deletion of objects stored on a storage system of a computerized system and, in particular, provides for a reduction in the number of keys that need to be stored.</p> |
