asymmetric encryption example

the private key contains the public key $data = file_get_contents ($data _file);echo "PlainText data is: $crypted _data = null; Ciphertextif (Openssl_private_encrypt ($data, $crypted _data, $private _key)) {echo "The following is the secret key encrypted ciphertext:} else {echo "Cryptographic failure:while ($msg = openssl_error_string ()) {Echo $msg. "}}$decrypted _data = null; Encrypted plaintext after restoreif (Openssl_public_decrypt ($crypted _data, $decrypted _data, $public _key)) {echo "B

Use openssl to implement rsa asymmetric encryption algorithm example. This article describes how to use openssl to implement rsa asymmetric encryption algorithms. For more information, see the following code :? Php *** use openssl to implement

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;/***

This article mainly introduces the use of OpenSSL to implement RSA asymmetric encryption algorithm example, we refer to the use of the bar nbsp; Code as follows: ; nbsp; nbsp; need to be aware that Apache supports OpenSSL nbsp;

Copy Code code as follows: /** * Use OpenSSL to implement 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 $path is the keys saving path */ Public function __construct ($path) { if (Empty ($path) | |!is_dir ($p

This article describes how to use openssl to implement rsa asymmetric encryption algorithms.The Code is as follows:

Symmetric encryption and asymmetric encryption, asymmetric encryption What is encryption? Encryption is divided into two parts: algorithm and key. The algorithm remains unchanged, and t

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 det

Chapter 2 asymmetric encryption algorithms-DH and asymmetric encryption algorithms-dh Note: In this section, refer to "advanced encryption algorithms-asymmetric encryption algorithms" i

As with symmetric encryption algorithms, the related classes of all asymmetric algorithms also exist in the System.Security.Cryptography namespace. In this namespace,. NET Framework provides four kinds of asymmetric encryption algorithms, such as RSA, DSA, ECC and Differ-hellman. This section describes several of the m

the cipher with her own private key (SK). F. Bob decrypts Alice's digital signature with Alice's public key (PK) to get a summary of the information.G. Bob uses the same hash algorithm to perform a hash operation on the received plaintext and gets a new summary of the information. H. Bob compares the summary of information received with the summary of the newly generated information and, if it is consistent, indicates that the information received has not been modified. with digital signatures,

Now we know that one of the biggest problems with symmetric encryption is how to transfer the key securely and not find a good solution in a symmetric encryption system. 1976, American scholar dime and Henman in order to solve the problem of information public transmission and key management, a new key exchange protocol is proposed, which allows both parties to exchange information on unsecured media and se

The basic process is very simple, then the public key encryption, the secret key decryption algorithm in the end what is it? This section briefly describes the basic principles of RSA algorithm, DSA algorithm, ECC algorithm, and Diffie-hellman algorithm, which involves many mathematical knowledge in number theory, discrete mathematics and analytic geometry, which interested readers can use to strengthen the theoretical basis. RSA algorithm RSA algor

Chapter 2 Summary of three asymmetric encryption algorithms: asymmetric encryption algorithms 13.1 DH The cornerstone of asymmetric algorithms It can only be used for key distribution and cannot be used for data encryption

Asymmetric Data Encryption DH algorithm and asymmetric Data Encryption dh Algorithm Asymmetric encryption algorithms are relative to symmetric encryption algorithms. For more informatio

Asymmetric encryption seems to be simpler than symmetric encryption in theory, but the details in practical applications are much more complex, in order to be understood from the very simple. NET, this section is a step-by-step understanding of the details.Asymmetric key When an instance of the class is created with an asymm