Secure Telephone System provides integrate security services: confidentiality, authority certification, integrality and anti-denying.
安全电话系统提供了完整的安全服务：保密性、身份认证、完整性、抗抵赖性等。
Secure Telephone System provides integrate security services: confidentiality, authority certification, integrality and anti-denying.
安全电话系统提供了完整的安全服务：保密性、身份认证、完整性、抗抵赖性等。
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