在密码系统中，PKCS#11是公钥加密标准（PKCS, Public-Key Cryptography Standards）中的一份子 ，由RSA实验室(RSA Laboratories)发布[1]，它为加密令牌定义了一组平台无关的API ，如硬件安全模块和智能卡。

PKCS#11称为Cyptoki，定义了一套独立于技术的程序设计接口，USBKey安全应用需要实现的接口。

-In cryptography, PKCS# 11 is the Public Key Cryptography Standards (PKCS, Public-Key Cryptography Standards) in part, by RSA Laboratories (RSA Laboratories) release [1], it defines a set of cryptographic token platform independent API, such as hardware security modules and smart cards. PKCS# 11 is called Cyptoki, defines a set of technology-independent programming interfaces, USBKey security applications need to implement an interface.