Key management and key synchronization are two important problem for realizing an one-time pad system.
密钥管理和密码同步是一次一密系统应用于实际的两个关键难题。
When there aren't any waves, SUPs are the next best thing. The rider stands on the board the entire time, and uses a two-meter long pad- dle to navigate over the water.
当没有任何浪的时候,SUP(站立浆板)是另一个最好的选择,整个过程站在浆板上,用浆在水里划水推动自己前行。
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