digital watermarking

Through a large number of literature studies, the basic steps of B-ultrasound imaging include:Beam formation, digital signal processing, and digital image processing. Digital beam synthesis is the basis for digital signal processing and imaging in the later stage. It is also the first step in the long journey. Direct

The article is still good, but the images cannot be normally displayed. The csdn album cannot be viewed outside the site, and the blog garden cannot upload images. Therefore, if you want to see the picture, you can view it on my csdn blog. The link is as follows: Http://blog.csdn.net/okaimee/archive/2010/06/11/5663436.aspx Digital subtraction angiography (DSA) is a new medical imaging technology emerging in the 1980s S. It is a new method of examinat

Bob has a public and private key. Bob's public key is public and can be obtained by anyone. But only Bob has his own private key. Both the public key and the private key can be used to encrypt the information separately, and the encrypted information can be decrypted with the other key accordingly. For example, when Susan encrypts information with Bob's public key, she sends it to Bob. Bob gets the message, decrypts it with his private key, and obtains Susan's information. Other people, even i

9.5.3 Digital Signature principledigital signatures are a way to ensure data integrity and originality. A digital signature can provide strong evidence that the data has not changed since the data was signed, and that it can confirm the identity of the person or entity that signed the data. Digital signature realizes the important security functions of "completen

Digital signature is an application of digital certificates. At present, the most important application in China is the application of electronic signatures. There are two types: electronic seals and electronic signatures.Digital signature: 1. Hard to deny 2. confirm that the file is true. Digital signature is an encryption process, and

CA certificates are widely used in digital signatures, and because Windows supports RSA algorithms well, many third-party applications under the Windows platform support the application of cryptography for RSA algorithm certificates. Recently, the opportunity to take advantage of project summary, especially in Windows under the common CA Certificate digital signature application. The program is divided into

x509EncodedKeySpec = new X509EncodedKeySpec(keyBytes); KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORTHM); Key publicKey = keyFactory.generatePublic(x509EncodedKeySpec); //对数据解密 Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm()); cipher.init(Cipher.ENCRYPT_MODE, publicKey); return cipher.doFinal(data);}Private key encryption /** * Decrypts with public key * @param data encryption * @param key key * @return * @throws Exception */public static byte[] Decrypt

Article Description: currently in the user-led design to take digital guide design of the main concentration of four types of Web sites or Products: (1) shopping sites, such as group purchase stations, they use numbers to create a scarcity of impressions and incentives to follow suit; (2) system optimization software, such as 360 software, use the number to cause user psychological panic and use pleasure (3) Social networking sites, using

Yesterday, China Financial Certification Center (CFCA) deputy general manager Caoxiaoqing revealed that, according to the CFCA of the latest monitoring found that the net silver thieves to the net silver attack means, technology has accelerated the trend of updating, has been from the attack password to attack digital certificates. NET silver users if only download the digital certificate stored in the comp

Digital Baby phone waterproof coating compared to other brands where the advantages? Digital Baby mobile phone waterproof coating of the most powerful function is waterproof, in this field there is no one product can be compared with digital baby mobile phone waterproof coating, the root cause is the latest digital bab

digital signatures and digital certificatesThe introduction of digital signature can refer to this article.Here's a little bit about asymmetric encryption:Content encrypted with the public key can only be decrypted with the private key, and the content encrypted with the private key can only be decrypted with the public key.This is more secure than symmetric encr