Authors: Matt Blaze, Whitfield Diffie, Ronald L Rivest, Bruce Schneier, Tsutomu Shimomura, Eric Thompson, Michael Wiener
To provide adequate protection against the most serious threats — well-funded commercial enterprises or government intelligence agencies — keys used to protect data today should be at least
75 bits long. To protect information adequately for the next
the face of expected advances in computing, keys in newly-developed systems should be at-least
90 bits long.