1917年,Vernam提出了一种完善保密加密方案,现在被叫做一次一密(one-time pad)。在Vernam提出这个方案的时代,并没有证实其是完善保密加密(perfectly secret);事实上,当时还没有完善保密加密的概念。大约25年以后,香农(Shannon)引入了完善保密加密的概念,并且证实了一次一密能够达到完善保密加密的安全等级。
但是要是我们不知道‘秘钥’(或者是,等价的,noisy channel里的噪声),或者说这个秘钥就像是信道里随机产生的噪声一样,那我们就回到了 noisy channel里的情况了 ---香农定理告诉我们,我们无法无损的传输任何消息。 我认为这种时候,我们无法获得任何P(m)的信息。这点可以留给读者思考。
Define one-time pad. one-time pad synonyms, one-time pad pronunciation, one-time pad translation, English dictionary definition of one-time pad. n. A key used in private-key cryptography that is the same length as the contents of the message being encryp
one-time pad (redirected fromone-time pads) Encyclopedia (wŭn′tīm′) n. A key used in private-key cryptography that is the same length as the contents of the message being encrypted, providing unbreakable encryption if the key is perfectly random and used only once. ...
Paint Pad is a paint app for macOS which is similar to Microsoft Paint. It provides you the basic tools to draw quickly and allows the users to add text on images and resize, rotate, flip and crop images. It also allow you to combine multiple images into one image. Besides, it has ...
Get help from Copilot to summarize your handwritten notes in Microsoft OneNote.1,16,17 Generative AI in Adobe Photoshop With simple text prompts in everyday language, you can create, edit, transform, and bring to life whole new worlds with the power of AI.1 ...
Onetoone Interactive Pte Ltd Free Screenshots iPhone iPad Description Micepad is an award-winning Event App that creates a more engaging and productive experience in conferences and meetings. The Micepad app allows you to have all your event’s information at your finger tips, such as Event Age...
OPPO Find X5 Pro will become one of the first devices to receive the new Google Android 13 Beta 1 update.
The Logitech Combo Touch (left) versus Magic Keyboard (right). Similar trackpad dimensions. The Combo Touch costs a lot less (but works with non-Pro iPads). Scott Stein/CNET The trackpad is simple and responsive The trackpad is smaller than the one on any MacBook -- it's more like ...
Get help from Copilot to summarize your handwritten notes in Microsoft OneNote.1,16,17 Generative AI in Adobe Photoshop With simple text prompts in everyday language, you can create, edit, transform, and bring to life whole new worlds with the power of AI.1 ...