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Old 11-21-2013, 02:19 AM   #1
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Unhappy RSA algorithm query on message length

In RSA algorithm, it is given that plain text size must be less than or equal to ( key size - 11 ).

why it is like that. what is that 11 actually...?
Old 11-21-2013, 06:38 AM   #2
Registered: Oct 2012
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The length of the data D shall not be more than k-11 octets, which is
positive since the length k of the modulus is at least 12 octets.
This limitation guarantees that the length of the padding string PS
is at least eight octets, which is a security condition.


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