写密钥 meaning in English

wire key
write key

This thesis discusses the theoretical models and some key techniques of information hiding in digital images . in this thesis , we attempt to establish a theoretical framework for image information hiding . at fist , a modification of a simmon ' s " prisoners " problem is proposed to admit typcal image information hiding scenarios
通过考察图象信息隐藏与攻击的典型应用场景，从发信方和收信方的知识约束、隐写密钥管理、收信方的行为模式和攻击方的行为约束等几方面对simmons提出的“囚犯问题”进行扩充，提出了一个扩展的理论模型。