In the context of digital security, a key is a piece of data which is used to encrypt or decrypt other pieces of data.
在数字安全语境中，密钥是一段数据，用于对其他数据进行加密或解密。
To study the cryptosystem suitable to encrypt data, to implement digital signature and identify authentication on the USB Security key.
主要研究内容如下：(1)研究适于usb安全钥上实现数据加密、数字签名和身份认证功能的密码体制。
This paper brings forward a text embedding digital watermarking method based on image's DWT domain, meanwhile, using the chaotic sequences to encrypt the text data and BCH code to correct them.
提出了一种在图像小波域中嵌入文字的新型鲁棒水印算法，并对嵌入的文字进行混沌加密和BCH纠错编码。
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