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Re:UK government urged to use Bitcoin-style digital ledgers by ctz on Tuesday January 19, 2016 @05:36AM (#10929799)
"chain of digital signatures" was referring to the method of assigning value between owners via transactions (s2). That's not the blockchain, nor was it a new concept -- see bmoney, Wei Dai, 1998.

They described the blockchain as an "ongoing chain of hash-based proof-of-work, forming a record that cannot be changed without redoing the proof-of-work"

Re:UK government urged to use Bitcoin-style digital ledgers by throwaway7767 on Tuesday January 19, 2016 @05:42AM (#10929818)
Thanks for the correction re: terminology used, it's been years since I read the paper.