This might not mean anything, but NetScreen-5GT 6.2.0r15 (The first affected version) was the first release with a SHA-1 sum. April 2015 is the first archive of this page I could find.[0]<p>I wonder if the reasoning behind the SHA-1 is (possibly) that they were starting to notice some strange activity.<p>I applaud them for disclosing all of this. That could not have been an easy thing to have to do.<p>[0] <a href="https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20150422145246&#x2F;http:&#x2F;&#x2F;www.juniper.net&#x2F;support&#x2F;products&#x2F;screenos&#x2F;ns5gt&#x2F;6.2&#x2F;#sw" rel="nofollow">https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20150422145246&#x2F;http:&#x2F;&#x2F;www.junipe...</a><p>Archive link:<p><a href="https:&#x2F;&#x2F;archive.is&#x2F;jdw13" rel="nofollow">https:&#x2F;&#x2F;archive.is&#x2F;jdw13</a>