Update 2021-02-06: All challenge writeups posted.
Update 2021-01-31: Archive moved to the Internet Archive.
In January of 2021, the Shabak (the Israeli Security Agency) published a set of CTF challenges at shabakchallenge.com. The original website may be gone now, but I downloaded what I could and uploaded it to the Internet Archive.
For your amusement, I also present writeups on some of the challenges I solved.
They will be linked here as soon as they are published.