A blockchain is a chain of blocks or a set of transactions. Blockchain participants sign their own transactions with tamper-resistant keys. This ensures that each entry is authentic. Two secure hash codes are added to the block: one to protect the block from unauthorized access, and one to protect previous actions. The combination of the two hashes prevents a participant in the transaction from surreptitiously changing the transaction.
As a clearinghouse without intermediaries, the blockchain is revolutionary. Its operations are guaranteed to be legitimate. It is said (and most likely true) that Bitcoin has never been hacked. Think of the lithuania mobile database as a ledger in which a community of users records their transactions and which they consult for a trustworthy record of everything that has been done.
What does this have to do with security and mobile devices? Blockchain is a way to organize collaboration without intermediaries. If verification/authentication is the key to trust, then blockchain solves the problem. It is easy to see how automatically verified collaboration can greatly help secure mobile devices, and to see the existing limitations. Authenticity plays a critical role in a mobile security strategy, but it is neither a universal nor an exhaustive solution.
A good place to start is probably by registering the mobile device at the time of sale or even immediately after its creation. This can be done using the unique identifiers that mobile devices already have. The registry can then track changes in ownership, as well as the scope or applications for which the device is authorized. The same identifier can be registered across social networks, manufacturers, banks and financial institutions, even geographic sub-registries.