Topic: GSSSA - Hide your wallet in shares (Read 1011 times)

Is there a user friendly, technically not-challenging implementation of this?

Bitcoin has multisignature which allows split keys without any single point of failure. Anyone considering secret sharing should first have a darn good reason they aren't using multisig.

I have some concerns with this post:  
The post is "a bit pushy", also the question why noone is answering - so soon? What is the offer? It is unclear. And some "I have a big project in my mind, which I cannot tell you at this point in time" creates more doubts than questions on the reputation of the post.

Usually it is not recommend to download software/libraries from untrusted sources.
As such it is good to have the sources on github.
Compiled executables can have too many negative impacts, and we don't know yet, what it gives. We'd need a reference with checksums first, so this can be verified on some systems with users from the community, to raise level of trust.

That said, I like the sharing idea, I see it like steganography. Also it is similiar to the seeds we have in use. What makes your approach different from the existing solutions? What improves their security or handling? Can you elaborate a bit?

Almost everyone I've ever seen link to their own binaries on virus total was in fact distributing malware.  Virustotal is worthless for the kind of custom malware that is often posted on this forum and gives people a false sense of security.

There are many programs out there for shamir secret sharing, such as http://point-at-infinity.org/ssss/  most implementations I've seen leave a lot to be desired, including insecure random number generation which doesn't grant full information theoretic security, to incorrect share splitting such that sub threshold collections are sufficient to recover most of a key, to just gross timing sidechannels which any secret key handling software should avoid.

It is my view that In general, secret sharing is largely snake oil in practice because you must have a computer to split and join keys and if that computer is compromised your security is gone.  If you really had a compromise immune computer, just leave your key there and avoid the pointless ritual.

Bitcoin has multisignature which allows split keys without any single point of failure. Anyone considering secret sharing should first have a darn good reason they aren't using multisig.

~$ ./gsssa create "my secret sentence"
# Share 1
assume another atom adjust attract believe athlete attitude ball bulb base apple boss blossom bulk broccoli blossom abuse bring acquire betray brass blur bacon above amateur blind bachelor bomb bench any artefact
board answer birth budget barrel basic bird become banana bring alcohol banner boat absurd assume anxiety ankle aspect angle before arrest boss animal around bring alone alone area aerobic avoid buzz baby

# Share 2
broccoli author boil acquire budget budget because aunt between abstract auction apology blind actual black alert arrive action already balance brother brush bubble boring board address bleak balcony area brain bench bundle
ball brother battle apart blind bless believe about attitude bleak bounce age age busy addict cabbage act balcony assault alter breeze bring bottom battle around balance atom absorb awake across brief attend

# Share 3
anchor album accident cabbage barrel brain allow alien april address brass arch addict among bundle become asthma beach axis arch busy axis april any arctic away bind brother because affair august air
bamboo angle attend artefact auto blood broken arrow boy alpha before brother below body balcony absurd attract arrest barely abuse assist aspect blast bicycle bachelor behind bench balance average acquire buffalo awkward

# You need 2 shares out of these 3 shares to be able to get your secret back.

 The file "shares.txt" is now created with above shown information.

~$
~$ vim shares.txt
~$
~$ cat shares.txt
# Share 1
assume another atom adjust attract believe athlete attitude ball bulb base apple boss blossom bulk broccoli blossom abuse bring acquire betray brass blur bacon above amateur blind bachelor bomb bench any artefact
board answer birth budget barrel basic bird become banana bring alcohol banner boat absurd assume anxiety ankle aspect angle before arrest boss animal around bring alone alone area aerobic avoid buzz baby

# Share 3
anchor album accident cabbage barrel brain allow alien april address brass arch addict among bundle become asthma beach axis arch busy axis april any arctic away bind brother because affair august air
bamboo angle attend artefact auto blood broken arrow boy alpha before brother below body balcony absurd attract arrest barely abuse assist aspect blast bicycle bachelor behind bench balance average acquire buffalo awkward

  ~$
  ~$ ./gsssa reveal
RESULT: my secret sentence