I got approved to talk again at this year’s crypto symposium:
http://www.zodiackillerciphers.com/?p=648
Title: The Unsolved Zodiac 340 Cipher: Features or Phantoms?
Abstract: The Zodiac Killer’s first cipher was a simple substitution cipher that was quickly solved by amateur codebreakers. But after almost 50 years, his second cipher is still unsolved. Current research is focused on unusual statistical features found in the unsolved cipher. Are these features evidence of the underlying encryption scheme used by the killer? Did he use a type of classical cipher or invent a homemade scheme? Or are the features actually phantoms leading us down the wrong path? This talk will try to sort out the good and bad clues in the cipher text, and will invite the codebreaking audience to participate in this promising research.
I’m looking forward to it!
Sounds great Dave.
Yay! I am glad that you will participate again this year. I can not wait to see the videos and I really like the title (Features or Phantoms)
Hi David,
how was your talk at the symposium? Do you have any videos? Can‘t wait to watch them 
I think it went ok. I’ve been editing the video together and should be able to post it in a few days or so.
Fascinating symposium as always. Lots of great talks filled with amazing stories from the history of cryptography.
I think it went ok. I’ve been editing the video together and should be able to post it in a few days or so.
Fascinating symposium as always. Lots of great talks filled with amazing stories from the history of cryptography.
“I don’t know Chief, he’s very smart or very dumb.“
I finally finished and uploaded the video:
http://www.zodiackillerciphers.com/?p=679
Look forward to watching it in its entirely…hopefully later this evening. I’m sure you did a fantastic job!
“…they may be dealing with one or more ersatz Zodiacs–other psychotics eager to get into the act, or perhaps even other murderers eager to lay their crimes at the real Zodiac’s doorstep.“ L.A. Times, 1969
I really liked the presentation. You covered the significant observations. I think that it was wise to not discuss hypotheses for the observations, especially the P15/19 repeats. You didn’t have a lot of time, and without the hypotheses maybe someone else will think up some fresh ideas for a cipher. Good job.
Very good & interesting. So much easier than having to read stuff. Glad my repeating pattern shape thingy was of use for something. At least I think it was one of mine. 
“I don’t know Chief, he’s very smart or very dumb.“
Great presentation Dave
Very good, actual and clear presentation doranchak!
This is really the kind of information I want people to see when they google for the 340.
All questions answered perfectly, well done.
Thank you very much for uploading the video! The presentation was really good and very informative. I especially liked the nice animations.
I really liked the presentation. You covered the significant observations. I think that it was wise to not discuss hypotheses for the observations, especially the P15/19 repeats. You didn’t have a lot of time, and without the hypotheses maybe someone else will think up some fresh ideas for a cipher. Good job.
Thanks. Yes, it would have been too much to include all the various hypotheses. The talk already had too much detail; I was already afraid of boring everyone with too many numbers and other technical info. Hopefully someone else will indeed think up some fresh ideas!
Very good & interesting. So much easier than having to read stuff. Glad my repeating pattern shape thingy was of use for something. At least I think it was one of mine.
Thanks. Yes, the "trav patterns" were pretty useful! 
Sorry they didn’t turn out to be significant features – but they were fun to analyze.
