Please tell me how to achieve 1024 bit and above Arithmetic operation using 8, 16, 32 bit microcontroller. The Arithmetic operation consist of Addition, Subtraction, Multiplication, Division, Modulo.
Maybe because Andy knows how to read and noticed that the OP specified the ARM toolset. The ARM processors are 32-bit, so why is the question mentioning 8-bit and 16-bit processors?
i need 1024 bit arithmatic to implement RSA public key encryption technique in my system. With RSA public key encryption technique any raw data is converted into N bit of encrypted data. N is bit size of the key. it can vary depending on the security require in any application. in our application we want to implement 1024 bit RSA encryption technique.
as we can able to declare long (32 bit) or longlong (64 bit) variable in the keil compiler. with those variable i can able implement max32 bit or 64 bit RSA encryption technique. To achieve 1024 bit RSA encryption i need to write some special routine.
I AM LOOKING FOR THOSE SPECIAL ROUTINE.
I think link provided by Mike Kleshov will solve my requirement. I will go through it and will come back for any query.