end-to-end encryption

End-to-end encryption (E2EE) is a method of secure communication that prevents third parties from accessing data while it’s transferred from one end system or device to another.

Source: https://www.techtarget.com/searchsecurity/definition/end-to-end-encryption-E2EE#:~:text=End%2Dto%2Dend%20encryption%20(E2EE)%20is%20a%20method,intended%20recipient%20can%20decrypt%20it.