Čo je to blockchain a aký je jeho význam?

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<blockquote class="wp-embedded-content" data-secret="BR4xrIrJQV"><a href="https://touchit.sk/co-je-to-blockchain-a-aky-je-jeho-vyznam/198801">Čo je to blockchain a aký je jeho význam?</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://touchit.sk/co-je-to-blockchain-a-aky-je-jeho-vyznam/198801/embed#?secret=BR4xrIrJQV" width="600" height="400" title="&#8220;Čo je to blockchain a aký je jeho význam?&#8221; &#8212; TOUCHIT" data-secret="BR4xrIrJQV" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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