Method and device in which a data set that is relevant for a safety-critical process is processed by at least two redundant processing channels according to identical laws for each safe protocol and the redundant safe protocols are assembled into a common safe protocol, in that each processing channels accesses a common buffer register. For each register location, a write authorization is allocated only once such that the common safe protocol is assembled proportionally by writing different portions of the corresponding safe protocols. The contents of each register location of the buffer register is read before the transfer of the common safe protocol from the buffer register for verification of the safe protocol formed in common from each of the redundant processing channels. The safe protocol formed in common is released only as a reaction to a release for transmission by each redundant processing channel.