Caching sticker profiles within a sticker communication system

A method for multi-level caching for use in a sticker communication system, the method comprising:

• for each one of a plurality of stickers, each sticker having a unique ID and including a cache storing sticker profiles and including a wireless communicator transmitting and receiving sticker profiles, transmitting sticker profiles cached within the sticker's cache to other stickers that are currently nearby to the sticker, within range of the sticker's wireless communicator, wherein a sticker profile includes a unique sticker ID, a unique ID for an item of goods to which the sticker is attached, and a history of data entities in the form of
• [attribute name|attribute value|timestamp], and
• wherein the protocol for message communication is a protocol without awareness of locations of stickers, and with random data message exchange;
• for each one of the plurality of stickers which is an enhanced sticker, transmitting sticker profiles cached within the sticker's cache to a cloud level cache via an access point for a network, when the access point is currently within range of the enhanced sticker's wireless communicator;
• and
• for each cloud level cache, transmitting sticker profiles cached within the cloud level cache to a master cache,
• wherein the master cache has a larger cache than that of the cloud level caches, thus being able to cache a larger number of sticker profiles than a cloud-level cache.