The newer 12-page version on the preprint server has a PDF creation date of 3/3/2021, 11:32:56 AM, created with pdfeTeX-1.30.4.

https://eprint.iacr.org/eprint-bin/getfile.pl?entry=2021/232...

The previous (reportedly wrongly uploaded) version is from 12/5/2019, 9:10:13 AM created with pdfeTeX-1.30.4.

https://eprint.iacr.org/eprint-bin/getfile.pl?entry=2021/232...

The university website version is from 3/5/2020, 12:00:19 PM created with pdfTeX-1.40.15.

These dates & times are MM/DD/YYYY & CET.

A co-editor of the Cryptology ePrint Archive confirmed the submission on twitter:

https://twitter.com/Leptan/status/1367103240228261894

Other way around I think. Your link is an old version of the paper. The one on eprint was just updated today with a version of the paper that adds the "destroys RSA" line and removes the "work in progress" line (put it in the wayback machine to see the version that was there yesterday without the claim of destroying RSA)

That times out for me, I guess www.math.uni-frankfurt.de is now getting more attention than usual ;-)

Here is a version in the Google cache, it has an old date on it "work in progress 04.03.2020" and does not contain the "destroys RSA" sentence: https://webcache.googleusercontent.com/search?q=cache:E0L-S3...