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Topic: Cold / Brain wallet security question - page 2. (Read 1836 times)

legendary
Activity: 1775
Merit: 1032
Value will be measured in sats
October 24, 2013, 01:31:03 AM
#5
How about if you remember the last four digits and the first four digits?? That might help...i am not a math whiz but that must be more than 1 million possibilities  Wink
legendary
Activity: 3416
Merit: 1912
The Concierge of Crypto
October 24, 2013, 01:25:42 AM
#4
He'll try everything. He might get lucky. I dunno about you, but I'd rather not display the private key at all. You're better off encrypting it before printing it.
legendary
Activity: 896
Merit: 1006
First 100% Liquid Stablecoin Backed by Gold
October 23, 2013, 11:58:53 PM
#3
Even if it's only one digit aren't the possible combinations just as large as any other random key?  Also an attacker doesn't know how many digits are changed.  The question is are there attack vectors that utilize the fact that the public address is visible along with at least part of the private key?
legendary
Activity: 3416
Merit: 1912
The Concierge of Crypto
October 23, 2013, 11:54:43 PM
#2
One or more digits are different, but I have the rest of the private key? Someone is going to run a program against all the possibilities, and if it's below a few million someone will get the correct one.

Change more than one. Change maybe 30 digits.
legendary
Activity: 896
Merit: 1006
First 100% Liquid Stablecoin Backed by Gold
October 23, 2013, 08:01:06 PM
#1
If I have a private key written down somewhere and for further security change one or more of the digits and then have the public address from the resulting private key written next to it.  How secure is that?  Would a brute force attack or any other attack be easier or no?  
Example private key  6108A178B39FF904C9F408741935554E042BDE257DB7F5621555175BACAC2A9C
Bitcoin Address        1GHVFk9HB2ke2UJsqTWWYiqVHemUyn8jTL
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