 So and in my talk I will talk about trusted time stamping. What is trusted time stamping trusted time stamping allows you to prove that you had certain knowledge at a certain point in time or that you had access to a certain file and I think this is a very central question to Yeah to the question of doing science and doing openly because this way you can prove That you had for example an idea at a certain point in time the project that I will present is not just my own project But a project from my research group. That's why I want to briefly show them or some of them are also sitting here So it's a joint project So the service that I would like to present is called origin stamp. I started this service in 2010 2011 and the motivation for starting the service was that I had some student projects on our university web page Back then I was a PhD student and I wanted to motivate like bachelor or master students to work on certain research projects and then I found out that someone like copied these ideas and A company actually then made some money with that so I was thinking how is it possible to prove that you had a certain idea for let's say a master project and How can you do that? And I mean nowadays? I think it's very clear. You use the blockchain for that and back then It wasn't that clear what some people did was I can skip that now And what some people did of course you could go to a notary agent or you could maybe Tweet the idea and this way you would have a timestamp from Twitter or Facebook or something like that, but it's not really convenient So that's why we decided to develop this service another possibility a bit old-fashioned would be simply to Describe the idea you had and put it in an envelope and send it to yourself and don't open it So you see it's it's a possibility. It works, but it's not very convenient So the service that I want to present I will give a live demo Chrome okay, so if you want to try it yourself and you can also use your mobile phone and What I'm doing now just try it yourself So you go an origin stamp. Oh You open the web page and it's completely free So please open origin stamp org and not calm because calm. That's the commercial page but for research we have says completely free web page and When you open the web page you can see here this option Stamp here, or you can actually also just install the the mobile phone app, but I think it's easier if I demonstrate it now Using the web page. So if you click there, you have the possibility to either upload a file that could be a photo a PDF document Word document, whatever Or you can also just enter text here in a box and I Do demonstration if I type in here test. I mean we heard that before that This hash function. Yeah, so we The text I entered it's really hard to read. Yeah, but I entered test and then you see that at the bottom We have this Hash that corresponds to that text and whenever I change the text here. You see that the hash changes So if I say now stamp, I would actually see that I did that before at a another conference in 2014 and you can see that this text has already been entered before and the same is true, of course if you upload a PowerPoint file or research data, maybe Some some data you got from your microscope So whenever you have any kind of data that you use for your research, you can just timestamp it in this way proof That it already existed at a certain point in time you can also click here on the certificate Then you have all the information you need to verify this timestamp and as you can see it's really easy to use you basically just do drag and drop of the file and The file is not transferred to our servers because the hashing is done within the browser So even it's something really confidential. We never get really access to it Over the years, I mean we offered now for Yeah, even more than seven years. It has been used nearly three million times now and Yeah, you can try it yourself as I said it's free and you can also see here that every few seconds It's used somewhere in the world Okay, then I go back to the slides. Are there any questions regarding the usage? okay, I was wondering like in the Context of how IPFS works or these IPLD system So if I made a very small change to my data and is there a way that I can link that analyze or change data to this original It's it's not not possible, but of course you could timestamp that as well So that would be the only way so we really it's very simple actually the way we do it It's that we have we upload a digital file. Let's assume that you uploaded a video then we just as I said Gets a hash within the browser and then we do a Transaction within the Bitcoin network and Ethereum so that we have a permanent record in the blockchain of this file and Then it can easily be verified and of course since we offer this service for free and we don't want to bloat the blockchain We don't do a transaction for every file that you want to hash, but we like gather all the Hashes of a whole day and then every 24 hours we perform the transaction We have also some extensions that you can use for your research projects. For example Git so if you want to if you use version control system, you can like timestamp all the Source code development, of course, you cannot just use Git for source code, but you could also use git for when you write a publication for your latex file or whatever So you can really prove the state of your research on Every single day or we have a plug-in for WordPress the JavaScript plug-in and Also for backup solutions so that you can timestamp the state of your backups and we have a free-to-use API That's linked there for non-commercial purposes Here you find some information how it works So it's all documented on the web page and another possibility is that you can try our mobile phone app it's Yeah, also very easy to use basically you just take a photo and Then the photo is time-stamped and you can even see on a map where it was taken so I wait a second so that the people can find it later and of course it cannot just be used for for science, but also many people use it to for example when they get a rental car and They see okay. There's some damage to the rental car Maybe there's some some damage to the windscreen then you can just take a photo and if you return the rental car a week later and the rental car Company asks you to pay for the damage. You can simply say no that was pre-existing damage and Another possibility for example that I know people that used it when they moved into a flat And there was some damage in the flat and later when they moved out the landlord asked them to pay for that So that's another possibility Let's see whether that works Maybe you've seen that I think it's also It's It's a video that shows a new technology using machine learning and it allows you to The playing yeah, so you have the source sequence on the left and the Artificial creation on the right and I think that's also a nice application of trusted time-standing Because we don't really know what is real and what is fake anymore also in science so Let's think about the situation maybe in 50 years we want to know what president Obama said or president Trump said and I mean everyone can just create these very very realistic fake videos and Of course if you time stamp all this information then it's kind of preserved also for in 20 or 50 years and since more and more information is digital it's Gets always easier to fake this kind of information Here we see another short sequence So it looks really realistic and I think in two years Maybe three years. We will not be able to distinguish a fake from reality anymore And I think as I said also in this area time-stamping is really important then I would like to come to some Other applications another way what you can use it for is we all know these videos of Russian dash dash cams and In court if you have a video of a crash you cannot really use it because It's not in not a real evidence and it can be manipulated in the meantime so We developed an app that is a dash cam but uses also this kind of trusted time-stamping and after an accident of course you in a mobile phone you have Sensors that can detect accidents that they can detect the change in acceleration and then the Video is time-stamped within seconds after the crash and if later You have the court hearing you can present video evidence that already existed only a few seconds after the crash So you have the data from the airbag for example when it deployed and you have the time-stamp from the video in this way You can prove that you didn't change anything because you simply didn't have the time to take any manipulations This was also just cited from Germans supreme court so It seems that Yeah, the the value of dash cam footage and will change in the future The way it works is very simple. I think I don't have to explain it here in this audience. I Would like to say a few words about the current users of this and trusted time-stamping service of course researchers are like really important to us and I get maybe one phone call a week of Researcher that used it for for example when they synthesize proteins or some other things and they have some questions So there I would say the the biggest group of users, but also journalists use it for example in the war in Syria I know that they have used it, but also for your cases of insurance patent lawyers and yeah, so the Possibilities for using trusted time-stamping. I think they're really Yeah, there's a lot of possibilities Okay That was my last slide. Do you have any questions? You said geographical locations are also Stored as metadata, but is there a possibility also to geostamp But then the whomever stamps it has its geographical coordinate Assured right? Is it there were possible? so of course these geographic information that we include in the Stamp can be easily manipulated because we rely on the sensor data of the mobile phone It's more for yourself that you know for example if you were hiking and you saw something to know I was in these mountains three years ago, and I had this idea then it's maybe difficult to find it But if you know, okay, I had it when I was hiking in these mountains It's very easy to find it, but it's it can be easily manipulated. So it's not should not be considered as evidence I wanted to quiz you more on the granularity of your time measurements So you said you're doing it once a day, but in Bitcoin the best you could do is seven eight nine minutes That's fine for Current science, maybe but the IOT world of science millisecond. So there's the project from Google called rough time I was just wondering if you're aware of that and What innovations you thought you could implement to give you that per second time time stamping at scale? Okay, I didn't know about that project. I'll look into that and of course it really depends on the use case I think in the case of scientific ideas and scientific data in most cases This accuracy of one stamp time stamp a day is is good enough. We also have this commercial service origin stamp com for example Yeah, I think I can can say it BISF is using it for time stamping like things when in their production And then they need a higher accuracy So we use at the moment Bitcoin and Ethereum But if you want to have higher accuracy, of course, it would be better to use other blockchains as well That allow of a higher resolution. I agree Yeah, oh sorry Hey I have a question That's a little bit related to the whole kind of mechanism of time-stamping right because if you have a data set and then you Hash it you get some kind of unique anti-fire But if you want to prove say I write some code and I want to prove that I was the first person to do it Right and then you change a very little thing a space B equals will become a equals and the hash looks completely different. I wonder are there any solutions? out there for being able to prove like the similarity maybe of code or I Mean what you would need is kind of fuzzy hashing in theory that would be possible But I think the easiest solution is simply to if you for example if you talk about writing code that if you use something like version control system that you simply Time-stamp every commit you do and that's what we do with this plug-in So each time you commit your data is automatically time-stamped So you you don't have to do anything manually, but it works completely automatic Yeah, so I had a question regarding. I found it very interesting the German Supreme Court rolled on this dash cam recording using some of the research. Do you have any court cases? That are in regards to research data being verified because I'd be very interested in Seeing if from a legal standpoint if this time-stamping was used to back up research or patents that resulted from research Yeah, I I don't know of research that was discussed in court But they're like court cases where time-stamping on the blockchain. I mean, we are not the only ones anymore several companies that do that and Where it has been used in front of court successfully. I can send you Some information about a court case in China for example, yeah Okay, I think that thank you very much and it's for free it's for free Yeah, this is like really cool when you open the web page go on the dot org not dot com Yeah, and then I look I look for it like early on and we have the largest and most secure blockchain for science already set up Right, it's Bitcoin blockchain, right? So what's the point of like having more blockchains right for science? Okay, yeah, thank you very much