sha 256 - Why haven't any SHA-256 collisions been found

AsicCoin ASC

AsicCoin ASC is A SHA-256 crypto-currency, is based on Bitcoin version 0.8, with super random blocks. It is a coin for ASICs!
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SHA-256 is a member of the SHA-2 cryptographic hash functions designed by the NSA. SHA stands for Secure Hash Algorithm. Cryptographic hash functions are mathematical operations run on digital data; by comparing the computed "hash" (the output from execution of the algorithm) to a known and expected hash value, a person can determine the data's integrity. 証明書の期間が長くて、未だ対応できていないサーバーも散見されるので、備忘録。 ちなみに(SHA-2はSHA-256、SHA-512などの総称) 実際のSSL通信暗号強度の問題ではなく、署名の信頼性の問題。参考 SHA-1廃止 whether my PGP encrypted emails (RSA 2048) whether Bitcoin (SHA-256 and ECDSA) will be safe for the next 200 years or so. Bitcoiners especially talk about its money supply after 150 years, so I'm wondering whether there is any basis for their confidence! cryptography aes rsa sha dsa. I've been trying to do this exact thing, and found the following did the trick. This approach relies on using two Authenticode certificates, one for SHA-1 and another for SHA-256, in order to ensure the files are accepted as valid by Windows Vista and Windows Server 2008 which do not support being signed by a SHA-256 certificate even if the SHA-1 algorithm is used: Also each bitcoin hash is two (albeit constrained) SHA256. @James: your link divides by 1.37e9 and gives 26,254, but dividing by the correct 13.7e9 does give 2,625 like your text. Both: in Oct '17 bitcoin is up to 10e18x2/s thus 5.4e11 years or 39 universes. Plus, as you say, storing and comparing. $\endgroup$ – dave_thompson_085 Oct 19 '17

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