ISO IEC 19772:2009 pdfダウンロード。Information technology — Security techniques — Authenticated encryption 1 Scope This nternational Standard specifies six methods for authenticated encryption, i.. detined ways ot processinga data string with the following security objectives: data confidentiality, i.e. protection against unauthorized disclosure of data. data integrity, i.e. protection that enables the recipient of data to verify that it has not been modified. data origin authentication, i.e. protection that enables the recipient of data to verify the identity of the dataoriginator. All six methods specified in this lnternational Standard are based on a block cipher algorithm, and require theoriginator and the recipient...