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| template<domain D :shared3p , type T> |
| D T | shuffleColumns (D T[[2]] mat, D uint8[[1]] key) |
| |
Protocols to shuffle columns in a matrix with given key.
- Note
- D - shared3p protection domain
- Precondition
- the key is exactly 32 bytes long
- Returns
- a random permutation of the input matrix
- Postcondition
- the output matrixes columns are a permutation of the input
- Note
- the declassified value of the key does not matter, internally only the shares are used. If two vectors are shuffled using the same key the permutation applied is the same as long as the vectors are of the same length, and the key does not get reshared.
- Leakage
- None
◆ shuffleColumns()
| D T shuffleColumns |
( |
D T[[2]] |
mat, |
|
|
D uint8[[1]] |
key |
|
) |
| |
- Note
- T - any data type
- Parameters
-
| mat | - input matrix to shuffle |
| key | - an uint8 type key that specifies the permutation |
