The use of unique physical characteristics, such as fingerprints, voice patterns, or retinal scan, to authenticate a user; providing security for workstations or information stored in hard drive.

• 使用独特的物理特征，例如指纹、声音模式，或视网膜扫描来鉴别一个用户，为工作站或存储子硬盘的信息提供安全保证。