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Skip to main contentCrypto NewsOct 21, 2026, 12:35 a.m. EDT2 min readSolana’s Alpenglow, its biggest network overhaul since 2020, goes live Wednesday. (CoinDesk)SummarySolana’s Alpenglow upgrade is expected to reduce transaction finality to about 150 milliseconds from roughly six seconds by moving validator voting off-chain. Faster finality could make trading and payments feel more like those on centralized exchanges, while validator costs are expected to fall by about 60 percent. The upgrade is scheduled to activate Wednesday after six test-network restarts and a failed migration that was later successfully completed. Solana transactions could soon become irreversible in just 150 milliseconds, or roughly 40 times faster than today, as the network switches on its Alpenglow upgrade on Wednesday. The upgrade changes how validators, the computers that process transactions and vote on which ones are valid, agree with each other. Today, every validator writes its votes straight onto the blockchain like any other transaction, and a payment isn’t locked in until enough of them stack up — which takes about six seconds.

Updated Oct 21, 2026, 12:16 a.m. EDTPublished Oct 21, 2026, 12:11 a.m. EDT3 min readInternet panics after EMudhra's private key compromise. SummaryEight private keys belonging to Indian certificate authority eMudhra were compromised, potentially allowing attackers to forge certificates and impersonate trusted websites. Major browser makers quickly blocked the certificates, and no attacks have been reported, but some nonbrowser software may remain vulnerable because it does not check whether certificates have been revoked. Researchers said eMudhra used easily guessed integers as private keys, enabling all eight to be recovered from public certificates in under a second. The internet has been scrambling to patch a hole in the system that tells your browser which websites are real. It started on Oct. 17, when a researcher told browser makers that eight secret keys at eMudhra, an Indian company that vouches for websites, have been compromised. A researcher named Wayne reported the security flaw and to prove the vulnerability, he used all eight compromised keys to digitally sign his warning message: "We have a problem here – Wayne.

Oct 21, 2026, 12:07 a.m. EDT2 min readBitcoin hovers around $83,000 as AI earnings revive tech, ZEC jumps 11%SummaryBitcoin rose 1.3 percent to about $82,700 as strong technology earnings lifted Asian stocks and revived enthusiasm for the artificial intelligence trade. Zcash surged 11 percent after developers set the activation height for NU7, an upgrade designed to cut block times to 25 seconds and make payments confirm three times faster. Analysts at Hashdex said Bitcoin’s nearly yearlong bear phase may be nearing an end, though the cryptocurrency must reclaim $84,000 before the Federal Reserve’s Oct. 27-28 meeting to signal renewed strength. Bitcoin rose 1.3% to just above $82,700 as of Wednesday Asian morning hours, hovering around the $83,000 mark after strong earnings from SpaceX and Super Micro Computer revived the AI trade and sent tech stocks across Asia higher. ZEC led the majors, jumping 11% to about $1,260, after Zcash developers set the mainnet activation height for NU7, the network’s next upgrade. The activation height is the block number at which every node switches to the new rules.

Elon Musk said he likes the idea of merging Tesla with SpaceX in a potential move that would create a roughly $3.5 trillion technology giant combining AI, space exploration and electric vehicle manufacturing. “Do I think it would be a good idea? Yes,” Musk said of the potential merger during a SpaceX Q3 earnings call on Tuesday. Musk said that both SpaceX and Tesla have formed special committees of independent directors to discuss the idea at the request of shareholders, though he isn’t able to take part in the discussions due to being a conflicted party. A merger would bring Tesla into the same corporate group as Grok developer SpaceXAI (formerly xAI) and social media platform X, which SpaceX acquired in February. The talks also come as SpaceX’s AI business became its largest revenue segment in Q3, underscoring how central artificial intelligence has become to Musk’s expanding technology empire. “There’s a lot to be gained from cooperating on developing superintelligence software, chip design, the Terafab, obviously, robotics, mass to orbit with the Starmind constellation. Connectivity,” said Musk.

Open this photo in gallery:Trading numbers are displayed at the New York Stock Exchange at the opening bell in New York City on Monday. ANGELA WEISS/AFP/Getty ImagesThe United States is mired in an overseas conflict, inflation is on the rise, Canadians are uniting behind their flag and the top 10 companies in the S&P 500 make up nearly 40 per cent of the index. It is 1965. Today’s U. S. financial markets, dominated by technology companies and riding on enthusiasm for artificial intelligence, might appear unrecognizable to investors of the 1960s. But modern investors could be exposed to risks that would have seemed familiar a couple of generations ago: With high levels of index concentration – the domination of major market indexes by a small number of names – investors may be far less diversified than they think. Recent research by Toronto-based Picton Investments found that 83 per cent of Canadian investors are confident their portfolios are diversified, but only 57 per cent say they are familiar with the concept of index concentration.

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