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How to split data from variable??

Asked by Kushal Khaitan on 19 Jan 2013

datahex = sprintf('%02x', data);

I have converted image into array named data and then converted into hexadecimal.

Now I want to apply AES algorithm on it. But at a time only 16 bytes are are required.

How to read 16 characters from this datahex then next 16 and so on until all have been read.

I have AES algorithm and want to read 16 bytes at a time and then next 16 bytes.

Plz help....thanx

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Kushal Khaitan

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1 Answer

Answer by Walter Roberson on 19 Jan 2013
Accepted answer
for K = 1 : 32 : length(datahex)
  datasubset = datahex(K : K + 31);
  ... work with datasubset ...
end

Note here that it takes 2 hex digits to form one byte.

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Walter Roberson

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