unauthorized use of certificates

例句：

1. 1.The company's policy prohibits unauthorized use of its software.
   公司政策禁止未经授权使用其软件。
2. 2.The government has cracked down on unauthorized use of copyrighted materials.
   政府已打击未经授权使用版权材料的行为。
3. 3. The law strictly forbids unauthorized use of public funds.
   法律严格禁止未经授权使用公共资金。