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This article will explain in detail the differences between public key encryption and traditional encryption systems. The content of the article is of high quality, so the editor will share it with you for reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

Main difference: a public key is used to encrypt the data, while a private key is used to decrypt the data. Public key encryption refers to the encryption method composed of a pair of corresponding unique keys (public key and private key); the public key and the private key are a pair, if the data is encrypted with the public key, it can only be decrypted with the corresponding private key.

The main difference between public key encryption and traditional encryption system is that a public key is used to encrypt data, while a private key is used to decrypt data.

Public key encryption, also known as asymmetric (key) encryption (public key encryption), refers to an encryption method that consists of a corresponding pair of unique keys (that is, public keys and private keys). It solves the problem of key release and management, and is the core of commercial passwords. In the public key encryption system, what is not public is the private key, but the public key is the public key.

The public key and the private key are a pair. If the data is encrypted with the public key, it can be decrypted only with the corresponding private key; if the data is encrypted with the private key, it can be decrypted only with the corresponding public key. Because encryption and decryption use two different keys, this algorithm is called asymmetric encryption algorithm.

The basic process of asymmetric encryption algorithm to realize the exchange of confidential information is as follows: party A generates a pair of keys and exposes one of them as a public key to other parties; Party B who gets the public key uses the key to encrypt the confidential information and then sends it to Party A; Party A decrypts the encrypted information with another private key saved by Party A. Party A can only use its private key to decrypt any information encrypted by its public key.

The characteristics of public key cryptosystem:

The public key cryptosystem is an asymmetric key, which has the advantages of fast operation and easy key generation.

(1) High intensity of confidentiality

Its theoretical basis is based on the difficulty of decomposing large prime numbers in number theory. when n is greater than 2048 bits, the current algorithm can not decipher RSA in effective time.

(2) key distribution and management are simple and convenient.

In RSA system, encryption key and decryption key are different and separated from each other. The encryption key can be made public, the decryption key can be kept secretly by the user, and the number of keys kept in secret is reduced, which makes key distribution more convenient and key management convenient.

(3) Digital signature is easy to implement.

In the RSA system, only the receiver uses his own decryption key to sign the plaintext, and anyone else can use the public key to verify the signed text, but can not forge it.

About the difference between public key encryption and traditional encryption system is shared here, I hope that the above content can be of some help to everyone, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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