Financial services. Requirements for message authentication using symmetric techniques
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1 Scope This International Standard specifies procedures, independent of the transmission process, for protecting the integrity of transmitted banking messages and for verifying that a message has originated from an authorized source. A list of block ciphers approved for the calculation of a message authentication code ( MAC ) is also provided. The authentication methods it defines are applicable to messages formatted and transmitted both as coded character sets and as binary data. This International Standard is designed for use with symmetric algorithms where both sender and receiver use the same key. It does not specify methods for establishing the shared key, nor does it provide for encipherment for the protection of messages against unauthorized disclosure. Its application will not protect the user against internal fraud perpetrated by the sender or the receiver , nor against forgery of a MAC by the receiver .
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