29 Oct '16, 9am

Bitcoin Core 0.13.1 Enables SegWit to Ease Block Sizes

Bitcoin Core 0.13.1 Enables SegWit to Ease Block Sizes

Increased security for multisig: Bitcoin addresses (both P2PKH addresses that start with a ‘1’ and P2SH addresses that start with a ‘3’) use a hash function known as RIPEMD-160. For P2PKH addresses, this provides about 160 bits of security—which is beyond what cryptographers believe can be broken today. But because P2SH is more flexible, only about 80 bits of security is provided per address. Although 80 bits is very strong security, it is within the realm of possibility that it can be broken by a powerful adversary. Segwit allows advanced transactions to use the SHA256 hash function instead, which provides about 128 bits of security (that is 281 trillion times as much security as 80 bits and is equivalent to the maximum bits of security believed to be provided by Bitcoin’s choice of parameters for its Elliptic Curve Digital Security Algorithm [ECDSA].)

Full article: https://news.bitcoin.com/bitcoin-core-0-13-1-released-seg...

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