create_transposition_key

Engine.create_transposition_key(secret_key, level)

Creates a transposition key, which is used for matrix transposition. Requires a secret key.

• Input:
  • SecretKey
  • level: int, optional
    • Creates the key with a reduced size to contain only the specified multiplication levels.
• Output:
  • TranspositionKey

Warning

• The vector form does not support this operation.

from desilofhe import Engine

engine = Engine(form="matrix")
secret_key = engine.create_secret_key()
transposition_key = engine.create_transposition_key(secret_key)

level_3_transposition_key = engine.create_transposition_key(secret_key, level=3)