News Bitcoin -Did Julian Assange Just Use the Bitcoin Blockchain to Prove He Is Alive?There had been some speculation that Mr. Assange was dead or lost control of his online identity. Instead of holding up today’s newspaper, as might have happened historically, the Australia-native used the blockchain technology to prove he is alive, contained at the Ecuadorian embassy. He referred to it as “proof of life.”
As a public cryptographic ledger, the bitcoin blockchain allows anyone to “mine” and add pieces of information (known as ‘blocks’) to the blockchain, but only upon completing a computer process known as “proof of work”.
Bitcoin’s hash algorithm, known as SHA256, scrambles data stored in the blocks (in the case of bitcoin, mostly transaction data) into a string of letters and numbers referred to as a hash. Knowing what data went into creating a hash is very hard. However, it is very easy to determine the hash of a particular piece of data.
A bitcoin block hash represents a random group of letters and number virtually impossible to predict. Once distributed via the blockchain, however, the hash is widely available and cannot be altered. By reading the most recently published block hash, Mr. Assange could prove today’s interview had not been pre-recorded.
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