symmetric encryption example

[Preface]This article briefly introduces the concepts related to encryption technology, and finally summarizes the existing encryption technology in java as well as its usage and examples. [Simple encryption] 1. Simple concept Plaintext: the information before encryption Ciphertext: Confidential Information Algorithm

provided by the decryption party, PublicKey. Finally, the encrypted long data and encrypted symmetric key keys are stitched together and sent to the decryption party.After the decryption party is received, the data is decomposed first, and the encrypted symmetric key key and the encrypted long data are decomposed into two parts. Then the private key of the asymmetric algorithm is decrypted to obtain the

DotNet encryption-symmetric encryption and dotnet encryption -- Just one day before the Chinese New Year's Eve, it's close to you to go home. Some people are excited, because they will have to go through the annual installation drama in a few days, and all the parties, including relatives, friends, and students, will s

encrypt, while decryption requires another key. For example, you ask the bank for the public key, the bank sends you the public key, you encrypt the message using the public key, then only the holder of the private key-the bank can decrypt your message. Unlike symmetric encryption, the bank does not need to send the private key over the network, so security is g

1.Encryption Algorithm Daquan:Rsa:RSA is made of the initial letters of the surnames of Ron Rivest, Adi Shamir, and Leonard Adleman, who first publicly desc Ribed the algorithm in 1977.Http://www.emc.com/corporate/about-rsa/index.htmHttps://en.wikipedia.org/wiki/RSA_%28cryptosystem%29DSA: Digitally Signature algorithm digital Signature AlgorithmECDSA: Elliptic Curve digital Signature algorithm Elliptic curve Signature algorithmDSS: Digital Signature S

Symmetric encryption is the oldest and most classical encryption standard in the field of computer encryption. Although symmetric encryption is considered no longer a secure encryption

With the development of symmetric cipher, the DES data Encryption Standard algorithm, because of its small key length (56 bits), has not adapted to the requirements of today's distributed open Network for data encryption security, so 1997 NIST publicly recruited new data encryption Standard, namely AES[1]. After a tric

symmetric encryption algorithm is characterized by open algorithm, small amount of computation, fast encryption, high encryption efficiency, without the advantage of high efficiency, it is better to directly use asymmetric encryption. In addition, each pair of users use a

Des:Digital Encryption Standard. Obsolete Standard.Single key algorithm is the sender of the information using key A for data encryption, the receiver of the information uses the same key a for data decryption. The single key algorithm is a symmetric algorithm.The algorithm is good at adding/solving speed, the key volume is short,

encoding format, not the encryption algorithm)MD5 (Message Digest algorithm 5, Information Digest algorithm)SHA (Secure Hash algorithm, security hashing algorithm)HMAC (Hash message authentication code, hash messages authentication code)CRC (cyclical redundancy check, cyclic redundant code check)Symmetric encryption algorithm: The

Symmetric encryption and asymmetric encryption, asymmetric encryptionSafe communication methods must meet the following three conditions:1. Integrity, that is, the message has not been tampered with midway through.2. Confidentiality, which cannot be decrypted by a third party.3. verifiable. The message receiver can determine who sent the message.

Http://www.cnblogs.com/1-2-3/archive/2007/09/17/colloquialism-digital-certificate-part1.htmlSummaryThis series is easy to read, so you can understand the basic principles of digital signatures and how to apply them (even if you are an enterprise boss who is not computer savvy, you can read this article). Then we step into the technical details, and finally will give a B/s information system using the digital signature demo.Because the digital signature is based on asymmetric

(Message Digest algorithm 5, Information Digest algorithm)SHA (Secure Hash algorithm, secure Hash Algorithm)HMAC (hash messages authentication code, hash message authentication code)CRC (Cyclical redundancy check, cyclic redundancy code checksum) Symmetric encryption algorithm: The encryption key is the same as the decryption keyDES (Data

session key to a time or quantity　　Controlling the use of keys　　　　Objective:1. Distinguish the type and scope of use of the key by some kind of identification2. Avoid the security risk of the master key as the data encryption key　　　　Control Vector Solution:1. The KDC generates the session key KS and uses a control vector CV to describe the usage and limitations of the session key according to the agreed specification. The message is then generated wi

-seed-ecb -seed-ofbBefore you give the OpenSSL enc command usage example, explain the principles and procedures for symmetric encryption and decryption:symmetric plus decryption, they use the same password , such as "123456", but this is a password, and is a plaintext password, very insecure, so should be complex for this simple password. The most direct method i

(' Myfirst_cert ')Nine: Create an asymmetric keyYou can also use the Sn.exe tool to createCreate asymmetric key asy_key1 with algorithm = rsa_2048 encryption by password= ' Asy_key1 '10: Create a symmetric keyCreate symmetric key sy_key1 with algorithm = aes_256 encryption by password= ' Sy_key1 'Create

Caesar Code 1. Introduce Caesar cipher as one of the most ancient symmetric encryption system, in ancient Rome has been very popular, his basic idea is: by moving the letters to a certain number of digits to achieve encryption and decryption. All letters in the plaintext are replaced Cheng Mi-wen after they are offset (or forward) by a fixed number on the alpha

Original: DES encryption and decryption matching C#des encryption decryption symmetric encryption in PHPThe online search for PHP des encryption and decryption exactly matches the previous c# string encryption decryption function

Certificates and asymmetric keys encrypt data using the internal public key at the database level, and data is decrypted using a database-level internal private key. Symmetric keys are relatively simple, and they contain a key for both encryption and decryption. In this case, encrypting the data with a symmetric key is faster and more appropriate for large data.

identity of each other. Identity authentication is divided into one-way authentication and two-way authentication. One-way authentication only the server side has the certificate, two-way authentication in the server and the client has the certificate. A typical HTTPS site only has a certificate for the server and no certificate for the client. One-way certification is a simplified version of two-way certification, the discussion process in this article without special instructions are consider