This problem cannot be solved by adding a message-size block (e.g., with Merkle-Damgård strengthening) and thus it is recommended to use a different mode of operation, for example, CMAC to protect integrity of variable-length messages.
This problem cannot be solved by adding a message-size block (e.g.). This was with Merkle. E.g. is Damgård strengthening. Thus it is recommended to use a different mode of operation-length messages. This was for example. This was with Merkle. Example is cmac to protect integrity of variable.