 Γεια σας, είμαι ο Ερός Μαγιο Τάκος, είμαι ένας δικαιώτητας της Ατήν Ποτάου του Γλώμβου. Στο βίντεο θα μιλάω για το Φέλημος, ένας δημιουργείος, πιο δημιουργείος, πιο δημιουργείος της Ευρωπαϊκής Βλόκτυνας. Είναι το δημιουργείο με Ματίας Φιτσί, Αγγελος Κιαγιάς και Αλεξάνδε Ράσσου. Οι Ευρωπαϊκές και πιο δημιουργείες της Λόκτυνας, στις Μπινκόν και Αθήρια, χρησιμοποιούν υπέροχες πληθυσσές της Ευρωπαϊκής Βλόκτυνας. Αυτό δημιουργείο είναι ότι η πρωτική βέβαια είναι μετά από πρόσφαγες της Ευρωπαϊκής Βλόκτυνας, μεταξύ της Ευρωπαϊκής Βλόκτυνας, πιστεύουν ένα πρόβλημα που δεν είναι τίποτα σιγουμένο. In fact, the more energy spent on computing this pouch, the more costly it is from malicious party to break the security of the protocol. It is exactly for this reason that these protocols have built in incentives for increased energy consumption, for example, in the form of block rewards. Αυτό ήρθε στον δο Fury βιντεῖο που έχει να θήσει κασιστ���χω. Λοιπόν,hayn chlor Russia freeb lockingpan χροντισμουάζει κατά τηνzialism ifoλλάδει και εκ της διασοcellασίας στρατίκη εικαρμού νομιτιμνομαι το μονο περισσμό του προσπα视φλείξη have been few 1. Οι ανάμπρουτος προσ horizontαστινο κομματοκο Kas such as memory or stake. This results in protocols whose security is based on different assumptions than proof of work blockchains. A different proposal is instead of trying to decrease the energy consumed to try to repurpose it for other uses. The simplest way to do that is using the block mining machines for hitting your home. A more sophisticated approach is to have miners compute proofs of useful work that require solving some externally useful problem. For example, there have been proposals for solving problems in physics or number theory or optimization. The useful work direction has proven to be quite challenging, with most of previous work suffering from one of the three following problems. First, that the work performed is not broadly useful. For example, in Primecoin, a well-known protocol, miners search for change of prime numbers. Secondly, that there is no formal security proof for the presented protocols. This is quite a serious problem because the security of these protocols is based on non-standard harness assumptions. And thus, we would like to have a clear understanding of the security arguments involved. Finally, some of the protocols rely on trusted third-party assumptions, such as trusted hardware. Since this utilization is an important goal of blockchain protocols, we would like to avoid such assumptions. The question we study in this work is whether we can build a useful work blockchain that does not have these drawbacks. In our paper, we present a useful work blockchain that can be used to solve optimization problems. Such problems have broad real-world applications, for example in transportation and resource allocation. Moreover, our protocol is accompanied by a formal security proof in the random oracle model, showing that it remains secured against an adversary controlling close to 50% of the total computational power in the network under favorable modern harness assumptions, or 33% under the same assumptions as Bitcoin. And at close to 100% of the computations performed are externally useful under strong modern harness assumptions, or 50% under weaker harness assumptions. Finally, our analysis does not assume any trusted third parties. To prove our protocol secure, we designed and analyzed a new generic proof of useful work. This required, first, formalizing what does it mean for a useful computation to be moderately hard. Secondly, amplifying the security of this computation so that it is grinding resistant and can be used in the context of permissionless protocols. And thirdly, showing how the computation can be embedded in the block mining process, which for security reasons has strict requirements on how often blocks should be produced. Finally, putting all these ideas together, we present a generic local search optimization algorithm that can be run on our blockchain. Thank you for watching.