Bremermann's limit

The Bremen - man limit describes the maximum processing speed of data processing systems.

Hans Joachim Bremer man ran from the equivalence of mass and energy and the Planck equation from the realization that the processing of symbols at most at a rate of 1.35639 ⋅ 1050 bit / kilogram / ​​second can be done.

In cryptography, this value is important in order to make an encryption method so that it can not be decrypted with the brute-force method.

For example, a computer from the mass of the earth, who works at the Bremen man boundary, perform approximately 1075 ( circa 2249 ) calculations per second. If one assumes that a cryptographic key could be tested with only one operation, a 128 -bit encryption would be decrypted in 10-37 seconds. A 256 -bit encryption would be cracked in about two minutes, a 512 -bit encryption, but only in 1072 years.