08-09-2017, 09:34 AM
Of course, people have thought of many naive ways of encoding messages over the centuries. The idea of the so-called Hill figures is to break the message into blocks of length L, after converting it into numbers. The result is a list of vectors in RL. Then each vector m is multiplied by an L x L - matrix A and some constant vector b is added. So the encoding function reads
c (m): = Am + b mod 26
Banks have to send thousands of messages about money transfers between them. If someone writes you a check that is presented to bank F, then a message will be sent from bank F to bank G (your bank) to put this amount into your account, after the check has been cleared. Obviously, there has to be a rigid standard for these messages. The following is a simplified version of an actual message standard. Each message block is a line, which describes a money transaction.
It can be understood in the following video:
c (m): = Am + b mod 26
Banks have to send thousands of messages about money transfers between them. If someone writes you a check that is presented to bank F, then a message will be sent from bank F to bank G (your bank) to put this amount into your account, after the check has been cleared. Obviously, there has to be a rigid standard for these messages. The following is a simplified version of an actual message standard. Each message block is a line, which describes a money transaction.
It can be understood in the following video: