Titanium | Chain Key Cryptography Overview

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Victor Shoup explains Chain Key cryptography, one of the fundamental breakthroughs behind the Internet Computer blockchain, enabling it to have a single public key. This allows any smart device to verify the authenticity of artifacts from the Internet Computer. His overview includes a discussion of threshold ECDSA signing, which enables canister smart contracts to have an ECDSA public key and to sign with regard to it - which is a prerequisite for the Internet Computer's direct integrations with Bitcoin and Ethereum.

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The question i always like to ask is, what can go wrong with ckBTC? Is it safer to store my BTC on my NNS wallet as ckBTC over, let's say, a Ledger as regular BTC? Or is there any vulnerability in the ckBTC? Maybe the canister or the wallet or anything...?
Thank you

BTC_PalmBeach