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@seizans
•   [ ]•
•                           (MAC:MessageAuthenticationCode)•    •    •                            A•    •    • text   MAC ...
MAC• HMAC• AES••
HMAC•
MAC•               (replay attack)    •                             n    •       A            B        C    •    •        ...
MAC•    • MAC    •    •    •
••    •B              A                        A    •           B           C            A    •               B       A   ...
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メッセージ認証コード(Message Authentication Code)

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暗号技術入門の解説用スライド。
認証(2)。

Published in: Technology, News & Politics
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  • Transcript of "メッセージ認証コード(Message Authentication Code)"

    1. 1. @seizans
    2. 2. • [ ]•
    3. 3. • (MAC:MessageAuthenticationCode)• • • A• • • text MAC = trans(text, key) • trans(text, key) MAC OK
    4. 4. MAC• HMAC• AES••
    5. 5. HMAC•
    6. 6. MAC• (replay attack) • n • A B C • • • •
    7. 7. MAC• • MAC • • •
    8. 8. •• •B A A • B C A • B A A B • •
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