Bitcoin’s 2020 In Tech – Bitcoin Magazine

Seemingly undisturbed by 2020’s craziness, and largely unfazed by bitcoin’s wild price swings that concluded with new all-time highs in December, Bitcoin’s technical community continues to plow ahead. Bitcoin’s software and the many projects around it were gradually improved throughout the year, as software was optimized, bugs fixed and privacy leaks patched. The bulk of this work, as vital as much of it is, doesn’t attract headlines.

Yet, a bird’s-eye view on Bitcoin’s tech development over the span of a year helps highlight new milestones in Bitcoin’s ongoing technological march forward. In 2020, too, the consistently growing Bitcoin development community introduced a number of useful new features, several particularly important upgrades and some especially notable improvements.

As this volatile year is drawing to a close, these were some of Bitcoin’s most notable technical developments over the past 12 months…

On Bitcoin’s privacy front, the PayJoin and CoinSwap projects this year represented two promising advancements.

PayJoin, also known as Pay to Endpoint (P2EP), is a trick that lets recipients of a transaction partake in the transaction through a CoinJoin, to basically send funds to themselves while also receiving the actual payment from the real sender. If a snoop, conducting blockchain analysis, were to assume that all coins sent in a transaction belonged to the same person — as they normally would — they’d be wrong. This already benefits the privacy of both sender and receiver, as the snoop would confuse (past) coin ownership between them. Moreover, if enough people use PayJoin, it could render this important heuristic for blockchain analysis useless altogether, in turn benefiting even the privacy of those who didn’t make PayJoin transactions themselves.

Although demo versions of the PayJoin tool had already been implemented for online gambling game Bustabit and the coin mixing software JoinMarket in late 2018, and…

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