Moving beyond simple substitution ciphers

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Reference no: EM133829522

Question

Moving beyond simple substitution ciphers, modern computers use symmetric, block ciphers to encrypt content. The block sizes are the size of the keys used. Modern block ciphers use 128 bit keys. Approximately many possible keys are there in a 128-bit block cipher? You should estimate this using 2 significant digits and a power of 10. For example,.

Reference no: EM133829522

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