Secret Share
$1.99
2.0for iPhone, iPod touch
Age Rating
Secret Share Screenshots
About Secret Share
Secret Share is software that performs Shamir's secret sharing method.
The share and combine methods support the following four methods:
(2, 2) 2 share 2 combine
(2, 3) 3 share 2 combine
(3, 3) 3 share 3 combine
(3, 5) 5 share 3 combine
After sharing, each share piece is about 80 bytes larger than the source data.
It does not have an authentication function.
No error correction code is used.
The calculation is done using the Galois field.
The generated share piece is like a series of coefficients of Galois field of simultaneous equations.
It has something like random oracle.
Therefore, each attempt always produces a different piece of variance.
There is no limit on the size of files (data) that can be handled.
However, I think that
about 1 MB
will be the realistic maximum size.
The reason is the time it takes to "combine".
The combine of secret sharing using "Shamia's secret sharing scheme" takes a lot of time.
1MB about 1 minute or less
about 15MB about 5 to 15 minutes
about 150MB about 1 hour to 3 hours
It is like this. (I think it's faster with a fast machine.)
However, it does not take so much time for share.
Usually, it takes about 1/10 of the time for combine.
However, combine takes much time.
Also, regardless of the number of variances of 3 and 5 share, 3 combine take
more than three times as long as 2 combine.
3 combine is simply 3 times longer than 2 combine.
On an old Windows XP machine, running (3, 5) 5 share 3 combine on a random
number of 158 MB takes such times:
share 12 minutes 24 seconds
combine 3 hours 10 minutes
Combining for 3 combine takes a considerable amount of time.
The share and combine methods support the following four methods:
(2, 2) 2 share 2 combine
(2, 3) 3 share 2 combine
(3, 3) 3 share 3 combine
(3, 5) 5 share 3 combine
After sharing, each share piece is about 80 bytes larger than the source data.
It does not have an authentication function.
No error correction code is used.
The calculation is done using the Galois field.
The generated share piece is like a series of coefficients of Galois field of simultaneous equations.
It has something like random oracle.
Therefore, each attempt always produces a different piece of variance.
There is no limit on the size of files (data) that can be handled.
However, I think that
about 1 MB
will be the realistic maximum size.
The reason is the time it takes to "combine".
The combine of secret sharing using "Shamia's secret sharing scheme" takes a lot of time.
1MB about 1 minute or less
about 15MB about 5 to 15 minutes
about 150MB about 1 hour to 3 hours
It is like this. (I think it's faster with a fast machine.)
However, it does not take so much time for share.
Usually, it takes about 1/10 of the time for combine.
However, combine takes much time.
Also, regardless of the number of variances of 3 and 5 share, 3 combine take
more than three times as long as 2 combine.
3 combine is simply 3 times longer than 2 combine.
On an old Windows XP machine, running (3, 5) 5 share 3 combine on a random
number of 158 MB takes such times:
share 12 minutes 24 seconds
combine 3 hours 10 minutes
Combining for 3 combine takes a considerable amount of time.
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What's New in the Latest Version 2.0
Last updated on Mar 31, 2021
Old Versions
Added support for iOS 14.
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Version History
2.0
Mar 31, 2021
Added support for iOS 14.
1.1
May 21, 2019
Supported iPhone X, XR, XS, etc.
1.0
Oct 19, 2017
Secret Share FAQ
Click here to learn how to download Secret Share in restricted country or region.
Check the following list to see the minimum requirements of Secret Share.
iPhone
Requires iOS 10.0 or later.
iPod touch
Requires iOS 10.0 or later.
Secret Share supports English, Japanese
