Here is a string 123456 for example, its MD5 ciphertext value is: e10adc3949ba59abbe56e057f20f883eHere, 1.txt is the file that needs to be encrypted.First, the method of encrypting strings and files with Oppnssl MD5.1. Oppnssl MD5 method of
Cryptographic decryption related conceptsThree ways in which man-in-the-middle attacks are commonly used on the Internet: 1) eavesdropping 2) data tampering 3) session hijackingClassification of cryptographic algorithm protocols:
a)
First, the basic knowledgeSymmetric encryption:The encryption and decryption parties use the same key to solve the data confidentiality, but the way the key is passed to the other party is not easy to implement;Public Key cryptography:Keys are
1. Encryption methodsymmetric encryption : encryption algorithm + passwordDES (56bits), 3des,aes (128bits), BlowfishCharacteristics:Encrypt, decrypt using the same passwordPartition the original text into a fixed-size block of data to encrypt the
First, the basic knowledge Symmetric encryption: The encryption and decryption parties use the same key to solve the data confidentiality, but the way the key is passed to the other party is not easy to implement; Public Key cryptography: Keys are
61. you can use the tar archive 1tar command to archive files. you can use tar to save multiple files and folders as a single file, and retain all file attributes, such as owner and permissions, the file created by this command is usually called
Recall a thing: Before using Linux to find Chinese input method, in Baidu entered the FCITX, and then the result has a, you are looking for is not: satirical Tencent. Originally can not remember this input method name, but later brother remember
OpenSSL: Open Source projectThree components:OpenSSL: Multi-purpose command-line tool;Libcrypto: public encryption library;Libssl: library, the implementation of SSL and TLS;OpenSSL command:OpenSSL version: Program release number[[email protected] ~]
Public key cryptography: The key is a pair of children appearPublic key: public to all; PubKeyPrivate key: Keep it for yourself, must ensure its privacy; secret keyFeatures: Data encrypted with the public key can only be decrypted with the private
Data Encryption Method:1. symmetric encryptionHigh encryption efficiencyDES3DES:AES: supports encryption of 128 192 256 512 with different lengthsBlowfishToolsOpenssl encGpg 2. public key encryption (asymmetric encryption)The algorithm is complex
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