Shulou(Shulou.com)06/01 Report--

This article mainly introduces the introduction of RSA encryption, the sample code in the article is very detailed, has a certain reference value, interested friends must read it!

RSA encryption is a data encryption algorithm, which is widely used in electronic commerce.

RSA algorithm is an asymmetric encryption algorithm, so what is an asymmetric encryption algorithm?

Generally speaking, the encryption is carried out like this: the original text is encrypted by a key (key) and becomes the ciphertext, and then the ciphertext is passed to the receiver, and the receiver uses the key (key) to unlock the ciphertext. In this process, encryption and decryption actually use the same key, which is called symmetric encryption.

As opposed to symmetric encryption, the key used for encryption and the key used for decryption are not the same key. Asymmetric encryption first creates two keys, which are called public keys and private keys, respectively. When we encrypt, we use the public key to encrypt, and when we decrypt, we have to use the private key to decrypt. This is the asymmetric encryption algorithm.

So why are asymmetric encryption algorithms widely used in e-commerce? We can take a look at the following scenarios.

A needs to encrypt communication with B. if they use a symmetric encryption algorithm, then the two of them need to determine each other's common encryption key in advance and ensure that it is not known by a third party. This can ensure the security of communication between Party An and Party B, but they need a premise that Party An and Party B must determine the encryption key in advance, and Party An and Party B must know each other. But in the Internet environment, Party An and Party B often do not know each other. If they still use symmetric encryption algorithms, then the first step in their communication is to pass the encryption key, and there is a risk that the encryption key will be intercepted by a third party. therefore, symmetric encryption cannot be applied to the Internet scenario.

If asymmetric encryption is used, or A sends a message to B, B will create two keys in advance, keep the private key B himself, and then send the public key to A. A uses the public key to encrypt the information, and then passes it to B. Finally, B uses his own private key to decrypt the data. In this process, the public key may still be intercepted by a third party, but the difference is that even if the third party gets the public key, it cannot unlock the ciphertext, because the private key needed to decrypt the ciphertext has been in B's hands all the time. So the process is safe.

So far, we have fully understood the principle of asymmetric encryption, and RSA encryption algorithm is one of the encryption methods of asymmetric encryption. RSA was created by Ronald in 1977. Livester, Adi. Samuel and Leonard. Adman proposed it together. All three of them worked at MIT at the time. RSA is made up of the initials of the three surnames.

The above is all about the introduction of RSA encryption, thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.