Editing Over-the-air update (section)

== Implementation ==
The distributor of these updates can decide whether users are allowed to decline these updates, and may choose to disable certain features on end-user devices until an update is applied. Users may be unable to revert an update after it is installed.

OTA updates are designed to be as small as possible in order to minimize energy consumption, network usage, and storage space. This is achieved by only transferring the differences between the old firmware and the new firmware, rather than transmitting the entire firmware. A [[Delta encoding|delta]] of the old and new firmware is produced through a process called [[Data differencing|diffing]]; then, the delta file is distributed to the end-device, which uses the delta file to update itself.<ref>{{Cite book |last1=Kachman |first1=Ondrej |url=https://link.springer.com/book/10.1007/978-3-319-31165-4 |title=Technological Innovation for Cyber-Physical Systems |last2=Balaz |first2=Marcel |publisher=Springer Cham |year=2016 |isbn=978-3-319-31164-7 |editor-last=Camarinha-Matos |editor-first=Luis M. |language=en |chapter=Effective Over-the-Air Reprogramming for Low-Power Devices in Cyber-Physical Systems |doi=10.1007/978-3-319-31165-4 |editor-last2=Falcão |editor-first2=António J. |editor-last3=Vafaei |editor-first3=Nazanin |editor-last4=Najdi |editor-first4=Shirin}}</ref>