📅 Original date posted:2014-07-25
📝 Original message:It's based on the block height, not the block's timestamp. If you have
access to the device and the phone itself is not pin locked, then you
can jailbreak it and get access to the wallet seed that way. A pin
locked device however is reasonably secure as the filesystem is
hardware aes encrypted to a combination of pin+uuid. This was just an
easy way to prevent multiple pin guesses by changing system time in
settings, so that isn't the weakest part of the security model.
Aaron Voisine
breadwallet.com
On Thu, Jul 24, 2014 at 8:21 PM, William Yager <will.yager at gmail.com> wrote:
> On Thu, Jul 24, 2014 at 10:39 PM, Gregory Maxwell <gmaxwell at gmail.com>
> wrote:
>>
>>
>> Is breadwallet tamper resistant & zero on tamper hardware? otherwise
>> this sounds like security theater.... I attach a debugger to the
>> process (or modify the program) and ignore the block sourced time.
>>
>
> It's an iOS application. I would imagine it is substantially more difficult
> to attach to a process (which, at the very least, requires root, and perhaps
> other things on iOS) than to convince the device to change its system time.
>
> That said, the security benefits might not be too substantial.
>
> ------------------------------------------------------------------------------
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Aaron Voisine [ARCHIVE] /
npub18g…knkzl
2023-06-07 15:24:22
in reply to nevent1q…76hq
Author Public Key
npub18gjvug29c4yg46lmplq38e75gg6wn5mn8taytckcsr4jt8p74h3s5knkzlPublished at
2023-06-07 15:24:22Event JSON
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"pubkey": "3a24ce2145c5488aebfb0fc113e7d44234e9d3733afa45e2d880eb259c3eade3",
"created_at": 1686151462,
"kind": 1,
"tags": [
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"content": "📅 Original date posted:2014-07-25\n📝 Original message:It's based on the block height, not the block's timestamp. If you have\naccess to the device and the phone itself is not pin locked, then you\ncan jailbreak it and get access to the wallet seed that way. A pin\nlocked device however is reasonably secure as the filesystem is\nhardware aes encrypted to a combination of pin+uuid. This was just an\neasy way to prevent multiple pin guesses by changing system time in\nsettings, so that isn't the weakest part of the security model.\n\nAaron Voisine\nbreadwallet.com\n\n\nOn Thu, Jul 24, 2014 at 8:21 PM, William Yager \u003cwill.yager at gmail.com\u003e wrote:\n\u003e On Thu, Jul 24, 2014 at 10:39 PM, Gregory Maxwell \u003cgmaxwell at gmail.com\u003e\n\u003e wrote:\n\u003e\u003e\n\u003e\u003e\n\u003e\u003e Is breadwallet tamper resistant \u0026 zero on tamper hardware? otherwise\n\u003e\u003e this sounds like security theater.... I attach a debugger to the\n\u003e\u003e process (or modify the program) and ignore the block sourced time.\n\u003e\u003e\n\u003e\n\u003e It's an iOS application. I would imagine it is substantially more difficult\n\u003e to attach to a process (which, at the very least, requires root, and perhaps\n\u003e other things on iOS) than to convince the device to change its system time.\n\u003e\n\u003e That said, the security benefits might not be too substantial.\n\u003e\n\u003e ------------------------------------------------------------------------------\n\u003e Want fast and easy access to all the code in your enterprise? Index and\n\u003e search up to 200,000 lines of code with a free copy of Black Duck\n\u003e Code Sight - the same software that powers the world's largest code\n\u003e search on Ohloh, the Black Duck Open Hub! Try it now.\n\u003e http://p.sf.net/sfu/bds\n\u003e _______________________________________________\n\u003e Bitcoin-development mailing list\n\u003e Bitcoin-development at lists.sourceforge.net\n\u003e https://lists.sourceforge.net/lists/listinfo/bitcoin-development\n\u003e",
"sig": "5d82f97dc1ebd04097f2a16bfd60e764a9fd68a159e8b27f3989df632ce50cc5045ec6f3a5d3e4515dd63b3e506b0be67abbbd361f0b1df9a64f87a9fb6a350d"
}