Japanese researchers break 41 out of 64 steps of SHA256 with preimage attack. - page 4.

betyourbits

newbie

Activity: 28

Merit: 0

Kind of interesting even if it is sensationalist. Something like this might happen at some point and ruin bitcoin in the future. Maybe we should update to sha512 or 1024 bits or something.

grue

legendary

Activity: 2058

Merit: 1452

Title: Japanese researchers break 41 out of 64 steps of SHA256 with preimage attack.
Abstract: In this paper, we propose preimage attacks [...]

sensationalist 6/10

TheoryOfBitcoin

newbie

Activity: 38

Merit: 0

This affects Bitcoin massively because bitcoin uses SHA256 hashes for transaction IDs and blocks. A preimage attack is when you can find a value that has a specific hash value. For example, when researchers break the full 64 steps of SHA256, they will be able to double spend transactions and mine blocks near infinitely fast.

Here is the paper http://www.scholr.ly/paper/2078146/preimage-attacks-on-41-step-sha-256-and-46-step-sha-512

Topic: Japanese researchers break 41 out of 64 steps of SHA256 with preimage attack. - page 4. (Read 8602 times)