在公证员权力有限的地方，或者在公证一方玩忽职守、行为不当的情况下，律师可以保护购房者。
Lawyers can protect buyers in situations where the powers of notaries are limited, or in the case of negligence or misconduct on the part of a notary.
对公证机关依法赋予强制执行效力的债权文书，一方当事人不履行的。
Where the litigant of one party fails to carry out the credit document to which a notary public has legally granted the effectiveness of forcible execution.
好的数字水印协议可以防止数字产品的非法传播，并且在不需要第三方公证的情况下可防止对诚实用户的误指控。
A perfect digital-watermarking protocol can prevent illegal distribution of digital products and avoid false-accusation to an honest buyer without the third part authorization.
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