Q:

In GCM, we define S as S = GHASH(A||0^v||C||0^u||[len(A)]||[len(C)]). What is v defined as?

mhmadesk

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2022-06-02

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In GCM, we define S as S = GHASH(A||0^v||C||0^u||[len(A)]||[len(C)]). What is v defined as?

64 ceil[len (A)/128] – len (A)
64 ceil[len (C)/128] – len (C)
128 ceil[len (A)/128] – len (A)
128 ceil[len (C)/128] – len (C)

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mhmadesk

2022-06-02

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(c).128 ceil[len (A)/128] – len (A)

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