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Kaspersky Labs and INTERPOL have presented research in which they show how blockchain-based cryptocurrencies can potentially be abused with arbitrary data that can be disseminated through its public decentralized databases.

To me, this makes Kaspersky and INTERPOL sound like a joke. A well-known antivirus/security software company and a large international police force took this long to figure out that you can put arbitrary data in the blockhain? The rest of us have known this all along, a few even use it as their business model. While I could see it being a problem in the future (especially if we don't fork to increase the block size, these spam transactions could eventually make it harder to get a legitimate transaction confirmed), so far it hasn't really hurt anything, it's just made the blockchain take up a little bit more hard drive space than it would have otherwise.

Quote from: ajareselde on April 11, 2015, 11:51:44 PM

I am not entirely cartain about the story, but i have read that there were even cases of shild porn pictures stored in blockchain, there is a copy here ;
https://bitcointalk.org/index.php?topic=191039.0 , and that is only a start of blockchain abuse.

How long ago was that, and Kaspersky (along with INTERPOL) is just figuring it out? No wonder people are laughing at this and/or attacking them. BTW, if you had read the entire thread you linked and looked into it, there were not (and as far as I know still are not) child porn pictures in the blockchain. What is there is some data from a TOR service called The Hidden Wiki which includes, among other things, links to TOR hidden services which served as blackmarkets, child porn sites and the like. Odds are, with all the "dark web" busts in recent news, a lot of those services have probably been shut down by now anyway and I'm sure new ones are springing up every day.