I was just wondering since disposable addresses and sub-addresses are derived from the main wallet address.
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"Also would having the private viewkey or spendkey of the main address affect the security of all the disposable addresses and sub-addresses?" This part is unclear to me. Can you rephrase it?– kenshi84Commented Mar 21, 2017 at 23:46
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I will just remove that part of the question since those addresses have no keys to get affected by– samwelljCommented Mar 22, 2017 at 16:28
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1 Answer
No.
Given an output pubkey P in a new transaction with its tx pubkey being R, you can recognize it as your incoming transfer by using your private viewkey a, looking for P - Hs(a*R)*G in your hashtable and finding an entry recoding the sub-address's index j. Its private key P=x*G is obtained as x = Hs(a*R) + b + Hs(a || j). So you need both of the original private view and spend keys for receiving funds transferred to sub-addresses and disposable addresses.
