Abstract: The disclosure relates to a collecting method implemented by a first device including a first volatile memory, this first device interacting with a second device including a second non-volatile memory, the memories comprising objects each constituting an instance of an object-oriented language class. The method comprises an analysis of the objects by running through an object tree from the persistent roots; and on detecting that the analysis is finished, a collecting from the first and second memories for deleting each object that has not been analyzed during said analysis. This analysis in particular comprises, for each object: the identification of each reference pointing to another object; and the definition of a first or second type for each identified reference, this analysis continuing only along the references of the first type.

Abstract: The present invention notably relates to a method for saving data stored in memory in a non-volatile memory (2) of a secure element (1), the method being characterized by steps for generating a backup image (IS) containing the data stored in memory in the non-volatile memory (2) and for writing the backup image (IS) into the non-volatile memory (2) of the secure element (1). The present invention also relates to a method for restoring saved data.