Hi, Please see the following article regarding the risks of using MD5.
http://searchsecurity.techtarget.com/news/4500270165/MD5-vulnerability-renews-calls-for-faster-SHA-256-transition Thanks, Xing ________________________________ From: yuliy...@cmss.chinamobile.com [yuliy...@cmss.chinamobile.com] Sent: Tuesday, April 11, 2017 3:52 AM To: openstack Subject: [Openstack] [Cinder-backup]why use sha256 instead md5 in chunk based backup-driver hi,all why we use sha256 instead md5 in chunk based backup-driver , in the current file chunkeddriver.py, we have object_sha256['sha256s'] list to store all the sha256 value of sha_block_size data , why we do not use md5 ,md5 is faster compute than sha256,and we all use the md5 value in _backup_chunk too, so we just need to compute one time and used in two diffrent place,it save much time ________________________________ yuliy...@cmss.chinamobile.com
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