Abstract: The invention relates to a method for transmitting a data block (104) via a message channel (130), said method having the following steps of: —subdividing the data block into at least one first sub-block (108) and one second sub-block (110), —generating first check data (114) for the first sub-block (108) and second check data (116) for the second sub-block (110), wherein a first transmission sub-block (118) is formed by the first sub-block and the first check data, and wherein a second transmission sub-block (120) is formed by the second sub-block and the second check data, —transmitting the first and second transmission sub-blocks in a transmission block (124) via the message channel, wherein the order of the bits to be transmitted in the transmission block is determined by a predefined scheme, wherein the scheme is designed in such a manner that one or more bits of the first transmission sub-block and one or more bits of the second transmission sub-block alternately follow one another.

Abstract: The invention relates to a security module comprising an interface (596) for receiving a first key of a first chain (400) and a second key of a second chain (402), wherein a predecessor key can be calculated from each successor key of the first chain by applying a first function, wherein the first function is a one-way function, wherein the second chain can be determined by iteratively applying a second function, wherein the second function is a one-way function, a processor (569) for executing program instructions (555), wherein, by executing the program instructions, the first keys of a first partial chain (408, 408?, . . . ) of the first chain are calculated by iteratively applying the first function beginning with the received first key, and second keys of a second partial chain (410, 410?, . . . ) of the second chain are calculated by iteratively applying the second function beginning with the received second key, and a partial chain (406, 406?, . . .

Abstract: The invention relates to a method for transmitting a data block (104) via a message channel (130), said method having the following steps of: -subdividing the data block into at least one first sub-block (108) and one second sub-block (110), -generating first check data (114) for the first sub-block (108) and second check data (116) for the second sub-block (110), wherein a first transmission sub-block (118) is formed by the first sub-block and the first check data, and wherein a second transmission sub-block (120) is formed by the second sub-block and the second check data, -transmitting the first and second transmission sub-blocks in a transmission block (124) via the message channel, wherein the order of the bits to be transmitted in the transmission block is determined by a predefined scheme, wherein the scheme is designed in such a manner that one or more bits of the first transmission sub-block and one or more bits of the second transmission sub-block alternately follow one another.