1. A computation device comprising: a first data storage unit that stores operation target data; an operation processing unit that executes an operation by using data; a data permutation unit that selects indicated data among the operation target data stored in the first data storage unit and data operated by the operation processing unit, provides predetermined delay for data received a delay indication among the indicated data based on a parameter, does not delay data not received a delay indication, executes permutation of indicated data based on a parameter, and outputs data operated in the operation processing unit and operation result data of the operation processing unit; and second data storage unit that stores the operation result data output by the data permutation unit.