lenze z 1024-bitovych klucov sa prechadza uz teraz. preco si robit kluc o ktorom sa predpoklada dnes, ze dlho nevydrzi?
Applied Cryptography
Assume a dedicated cryptanalyst can get his hands on 10,000 mips-years, a
large corporation can get 107 mips-years, and that a large government can get
109 mips-years. Also assume that computing power will increase by a factor of
10 every five years. And finally, assume that advances in factoring
mathematics allow us to factor general numbers at the speeds of the special
number field sieve. (This isn't possible yet, but the breakthrough could occur
at any time.) Table 7.6 recommends different key lengths for security during
different years.
Table 7.6
Recommended Public-key Key Lengths (in bits)
Year vs. Individual vs. Corporation vs. Government
1995 768 1280 1536
2000 1024 1280 1536
2005 1280 1536 2048
