In individualized data communication of a data entity (200) between peers of a group, the data entity (200) includes at least one common data piece (210) and at least one non-common data piece (220). The at least one common data piece (210) is shared by all peers of the group, whereas the at least one non-common data piece (220) is shared by a subgroup of the group. A non-common data identifier (600) is used to identify the at least one non-common data piece (220). By receiving the non-common data identifier (600), one peer of the group may determine whether another peer of the group is sharing the same non-common data piece (220).