can the government crack encryption?, page 3

reply to post by Elfwood

---

Essentially yes, which is what created the so called double and triple DES interim solutions. Double DES as stated in the post refers to the use of two DES encryption, with two different keys, effectively doubling the DES key from 56 to 112 bits. This more than doubles the strength of the cipher.

Each addition of a single bit doubles the amount of keys. So a 57-bit key is twice as long as a 56-bit key. A 58-bit key is four times as big as a 56-bit key, and so on. However, there is an approach used originally by Diffle and Hellman called "meet in the middle" which reduces the number of Double DES keys to about double the number in DES.

So yeah Double DES is better than single DES, but Triple DES is now considered the minimum strength DES to be used if DES is the encryption that is to be used.

Triple DES you use three DES encryptions, with three separate DES keys. But having three keys is a bit difficult, so a guy at IBM made a triple DES using two keys approach. (His name is Walter Truchman)


As for the DES encryption itself, here is a bit of history.

RSA data sec inc. did its first DES crack wargame in 1997. The first time it was cracked it took a team 96 days to do it. Within a year a team from distributed.net cracked DES in 41 days. In 1998 Distributed and EFF cracked it in 56 hours. Six months later they did it again in less than 24 hours.

Even though double and triple DES is considered much more difficult and secure, DES for all intensive purposes is considered to be dead and should not be used for high security material.

reply to post by darpa999

---

I believe they cannot solve all encryptions

reply to post by crispexi

---

Lets see them solve my 8,000 bit encryption.

Sno-Trains..A short History..(with short video)
  Posted 15 days ago with 16 member flags

U.S. Military conducting massive training exercise in the streets of Los Angeles
  Posted 19 days ago with 7 member flags

Scientists to Add Spider Genes to Human Genome to Create ‘Bulletproof Skin’
  Posted 9 days ago with 5 member flags

Pictures: Civil War Sub H.L. Hunley Finally Revealed
  Posted 9 days ago with 5 member flags

Neuroscience the new face of warfare: experts
  Posted 5 days ago with 5 member flags

Congress Passes Bill That Opens US Skies To Unmanned Drones
  Posted 4 days ago with 4 member flags

The Latest in Terminator Tech
  Posted 3 days ago with 3 member flags

U.S. Navy to test 32 megajoule EM Railgun in the coming weeks
  Posted 2 days ago with 3 member flags

Newest topics, updated in real-time:

Newest topics getting flags, in real-time:

Newest topics getting replies, in real-time: