rsa 2fa

Recently made a mobile project, there are server and client types of projects, the client is to log on, the server will also return data, the server is developed in Java, the client to support multiple platforms (Android, iOS), while processing IOS data encryption encountered some problems. At first, the solution was DES encryption, the boss said DES encryption is symmetric, network capture and anti-compilation may be cracked, so take RSA encryption.

1.RSA encryption algorithm is the most common asymmetric encryption algorithm2.RSARSA with its three inventors Ron Rivest, Adi Shamir, Leonard Adleman, named after the first letter,3. At present, the academic community can not prove the absolute correctness of the RSA algorithm, but also can not prove to negate its security, so it just shows that the algorithm is quite credible.The 4.

This article describes how to use openssl to implement rsa asymmetric encryption algorithms. The code is as follows: /*** Use openssl for asymmetric encryption* @ Since 2010-07-08*/Class Rsa{/*** Private key*/Private $ _ privKey;/*** Public key*/Private $ _ pubKey;/*** The keys saving path*/Private $ _ keyPath;/*** The construtor, the param $ path is the keys saving path*/Public function _ construct ($

RSA signature, Google is primarily used for app source control and billing. The so-called settlement, is also the control of the app only use the current machine on the login Google account from the Google market has downloaded the app to be able to use, so it has reached the purpose of the app sales.The addition of RSA signatures is mainly divided into the following steps 1). Add License Verification Libra

This article mainly introduces the use of OpenSSL to implement the RSA asymmetric encryption algorithm example, please refer to the use of it The code is as follows: _keypath = $path; }/** * Create the key pair,save the key to $this->_keypath */Public Function CreateKey () {$r = Openssl_pkey_new (); O Penssl_pkey_export ($r, $privKey); File_put_contents ($this->_keypath. Directory_separator. ' Priv.key ', $privKey); $this->_privkey = Openssl_pkey_get_

1. The first step in encrypting decryption is to generate a public key, a private key pair, and a private key to encrypt the contents through the public key(Can be reversed) Download the open source RSA key generation tool OpenSSL (usually the Linux system comes with the program), unzip to a separate folder, enter the Bin directory, and execute the following command: Copy the Code code as follows:OpenSSL genrsa-out Rsa_private_key.pem 1024OpenSSL pk

I. Using RSA certificates to encrypt and decrypt sensitive dataThe certificate standard supports three kinds of asymmetric encryption algorithms: RSA, DSA, Diffie-hellman algorithms. The most common is the RSA algorithm. So this article is encrypted and decrypted using the generated Mytestcert certificate generated by the MakeCert tool in the previous section, wh

Recently studied the QQ mailbox login process, found that QQ mailbox login more rigorous, plus a few tips, one point is the user's password with JavaScript to do a bit of RSA encryption, in its login page there is a 12345678 var PublicKey = " Cf87d7b4c864f4842f1d337491a48fff54b73a17300e8e42fa365420393ac0346ae55d8afad975dfa175faf0106cba81af1dde4acec284dac6ed9a0d8 Feb1cc070733c58213effed46529c54cea06d774e3cc7e073346aebd6c66fc973f299eb

Recently, there was a project involving cooperation with other websites. The authentication plan for communication between the two parties was implemented through RSA. Because it may involve different development environments, we need to study the support for RSA in different languages. By default, the Public Key File Created by OpenSSL is in PEM format, but the Java API import password can only be in der

When talking about RSA, you will think of public keys, private keys, encryption, decryption, digital signatures, and digital envelopes... However, I may have some misunderstandings about some of my understandings, just like I used to. I recently read the RFC 2313 document on RSA and added some tests of my own, finally, some relationships are clarified, including the following: 1. Relationship between the pu

(The following code is only used for testing. In some cases, the memory is not released. solve this problem by yourself) 1. RSA is asymmetric. First, a certificate and private key for testing are provided. 1) base64 encoding of certificates and private keys in PEM format (private and private keys are corresponding) void readPriKey(string a){a = "-----BEGIN RSA PRIVATE KEY-----\n";a.append("MIICXQIBAAKBgQD

About RSA encryption and decryption problem, nothing to get a bit, first the main process to save, for Exchange or later use.First make sure that you have the OpenSSL installed on your PC, and that your Mac system will install automatically after installation! How to install?? ..... Please Baidu ...The installation commands are as follows:sudo apt-get install OpenSSLCreate a folder anywhere in your location to save your public key and key,Open the Ter

Import java.security.InvalidKeyException; Import Java.security.KeyFactory; Import Java.security.KeyPair; Import Java.security.KeyPairGenerator; Import java.security.NoSuchAlgorithmException; Import Java.security.PrivateKey; Import Java.security.PublicKey; Import Java.security.interfaces.RSAPrivateKey; Import Java.security.interfaces.RSAPublicKey; Import Java.security.spec.PKCS8EncodedKeySpec; Import Java.security.spec.X509EncodedKeySpec; Import javax.crypto.BadPaddingException; Import Javax.cr

Asymmetric encryption algorithm is also called This algorithm can only be decrypted with the corresponding private key if the public key is used for encryption, or it can only be decrypted with the corresponding public key if encrypted with the private key. It is almost impossible to derive the private key from the public key (such an algorithm can be implemented using some irreversible functions)! OpenSSL supports RSA, DSA, DH three different asym

OpenSSL is a set of widely used open Source code It not only implements SSL, but also provides many useful tools, such as generating RSA key pairs, generating certificate requests, and small ca. We generally use these gadgets through OpenSSL commands. Is there a way to directly call OpenSSL functions to implement these functions? The answer is yes. Today we will introduce how to use OpenSSL programming to generate an

RSA Plus decryptionUsing System.Security.Cryptography; Private voidButton18_click (Objectsender, EventArgs e)//RSA Encryption { BOOLRsa_mode = radiobutton13.checked;//The Fill method is true to OAEP false to pkcs#1 1.5 stringRsa_message =Richtextbox15.text; Richtextbox12.text=""; byte[] Source = Encoding.Default.GetBytes (rsa_message);//convert plaintext to byte by

The RSA public Key cryptography algorithm was introduced in 1977 by Ronald Leevist (Ron rivest), Adi Samor (Adi Shamir) and Lennard Adman (Leonard Adleman). At the time, all three of them worked at MIT. RSA is the first letter of their three surnames made together.RSA is the most influential public key encryption algorithm, which can resist most of the cryptographic attacks known so far, and has been recomm

Before everyone has summed up, based on the key exchange DH algorithm, now for you to introduce a factor decomposition based RSA algorithm, this encryption algorithm has two implementation forms: 1, public key encryption, private key decryption, 2, private key encryption, public key decryption. The following for you to analyze the implementation of code, compared to the DH algorithm, RSA seems a little simp

Note: Just notes, there may be incorrect places RSA is the most widely used asymmetric encryption algorithm, that is, the public key, the key two parts, the public key is used for encryption, the private key is used to decrypt. The public key is public. The reliability of RSA algorithm is based on mathematical puzzles: it is difficult to do factorization on large numbers. There is currently no fast algorith

PC Login Sina Weibo, the client with JS in advance username, password are encrypted, and before the post will get a set of parameters, which will also be part of the post_data. This way, you can't simulate post logins (such as Renren) in the usual simple way. Through the crawler to obtain Sina Weibo data, analog login is essential. 1, before submitting a POST request, need to get four parameters (Servertime,nonce,pubkey and RSAKV), not previously mentioned just to get the simple servertime,non