数据完整性(Data integrity)是任何组织最微妙的方面。它在其生命周期内提供数据详细信息的可靠性和安全性。(reliability and security)然而，数据违规和数据篡改事件的数量日复一日地迅速增加。这样的问题通常会发生，因为网络犯罪分子总是不断尝试寻找新的敏感策略来伤害互联网用户。为了解决这样的问题，有一种加密技术(encryption technique)，通过将明文转换为密文来秘密保护数字数据。这样，只有经过授权的个人才能访问您的消息或数据(message or data)，而未经授权的人则不能。
例如，您想给您的好友发送一封信，说明您想念他，但您不希望其他人打开并阅读该消息。在本指南中，我将以简单的方式解释两种不同类型的加密，即(way i.e). 对称(Symmetric)和非对称(Asymmetric)加密。
对称和非对称加密(Symmetric & Asymmetric Encryption)之间的区别
众所周知，对称加密和非对称加密(Symmetric encryption and Asymmetric encryption)都是加密过程(encryption process)的形式。但是，这两种技术之间的基本区别在于，对称加密使用单个密钥，而非对称加密使用两个不同的单独密钥。
还有一点是非对称加密在执行过程(execution process)中相对较慢。由于对称加密不太复杂并且执行速度更快，因此它推断出一种更好的方式来传输大量数据。
什么是对称加密
如前所述，对称加密是一种仅使用一个私钥来加密和解密数据的加密形式。这种加密信息的方式在早期被广泛用于在政府和军队之间进行秘密对话。它主要使用私钥，可以是数字、字母、符号或任意字符序列，如BK5、RU-8。这些词与消息的纯文本(plain text)相结合，以便它可以以特定方式更改内容。由于(Due)具有不太复杂的算法，它可以更快地执行该过程。
虽然说得好，但凡事都有对错两面。同样，对称加密也有使用的缺点。也就是说，加密数据只能使用发送者用来加密的相同密钥来解密。(secret key)简单来说，发送者在发送信息之前使用密钥对数据进行编码，对吧？(secret key)现在，接收者也应该有相同的密钥(secret key)来解码加密的消息。由于具有如此简单的性质，这两种操作都可以非常快速地进行。
什么是非对称加密
非对称加密是一种加密模型(encryption model)，需要一对两个不同的密钥，即公钥和私钥。由于它使用两个单独的密钥，它也被称为公钥加密(key cryptography)，这就是为什么它被认为比对称加密更安全。
但是在这里你可能会想为什么它需要两个键？好吧，非对称加密使用一个密钥对数据进行编码，这称为公钥(public key)。这个公钥(public key)可供所有人使用。而非对称加密使用私钥来解码编码数据，并且必须保密。
例如，您向您心爱的人发送问候并使用公钥加密消息，然后您的朋友只能使用您拥有的私钥对其进行解密。但是，如果您使用私钥对消息进行编码，则您的朋友将需要您的公钥才能对其进行解码。
这种密码技术是一种比较新的方法，它提供了更高的安全性。这是因为非对称加密使用两个单独的密钥进行编码和解码过程。然而，非对称加密的一个主要缺点是它比与对称加密相关的过程花费更多的时间。
私钥
私钥虽然与算法一起用于编码和解码数据。但是这个密钥的主要需要是解密使用公钥加密的任何信息。
在数据加密中，此私钥也称为密钥，必须保密。这意味着，这个密钥永远不需要转移，因此第三方没有理由要求它。
公钥
顾名思义，此密钥是公开可用的。它不需要任何安全性，主要用于对信息进行编码而不是解码。
在本教程中，我以非常简单和透明的方式解释了对称加密和非对称加密以及示例。
而已。
What is the difference between Symmetric and Asymmetric Encryption?
Data integrity holds the most delicate aspect of any organization. It provides the reliability and security of data details over its lіfecycle. However, day after day the number of data violations аnd data-tampering incіdents is increasing raрidly. Such an issue commonly takеs рlace аs cybеrcrimіnals always keep trying іn finding new sensitive strategies to victimize internet users. To counter such a problem, there is an encryption technique that protects digital data sеcretly by converting plaintext to cіphertext. In such a way, only аuthorized individuals сould get access to your mеssage or data and those people who are not authorized, cannot.
For example, you want to send a letter to your buddy stating you miss him but you don’t want anybody else to open and read the message. In this guide, I’m going to explain two different types of encryption in an easy way i.e. Symmetric and Asymmetric encryption.
Difference between Symmetric & Asymmetric Encryption
As it is cleared out that the Symmetric encryption and Asymmetric encryption both are forms of the encryption process. But, the basic difference between these two techniques is that the symmetric encryption uses a single secret key while asymmetric encryption makes use of two different separate keys.
Another point is that asymmetric encryption is relatively slower in the execution process. Since the symmetric encryption is less complicated and executes faster, it infers a better way to transfer data having in large quantities.
What is Symmetric Encryption
As said earlier, symmetric encryption is a form of encryption that uses only one private key to cipher and decipher the data. Such a way of encrypting messages had been widely used in earlier times to have a secret conversation between administrations and armies. It mainly uses a private key that can either be a number, a letter, a symbol, or a sequence of arbitrary characters such as BK5, RU-8. These words are combined with the plain text of a message so that it could change the content in a particular way. Due to having a less complex algorithm, it executes the process faster.
Although it is well said that everything has both aspects, right and wrong. In the same way, symmetric encryption has also a disadvantage of using. And that is, the encrypted data can only be deciphered using the same secret key which the sender has been used to encrypt. In simple language, the sender uses a secret key to encode data before sending the information, right? Now, the receiver should also have the same secret key to decode the enciphered message. Because of having such a simplistic nature, both the operations can be carried out quite fastly.
What is Asymmetric Encryption
Asymmetric encryption is an encryption model that requires a pair of two different key i.e. public key and private key. Since it uses two separate keys, it is also known as the public key cryptography and that’s why it is considered to be more secure as compared to the symmetric encryption.
But here you may think Why does it need two keys? Well, the asymmetric encryption uses one key to encode the data and that is called the public key. And this public key is available to everyone. Whereas the asymmetric encryption uses the private key to decode the encoded data and that must be kept secret.
For example, you send greetings to your beloved one and encrypt the message using a public key then your friend could only decrypt it using the private key which has to you. However, if you encode the message using a private key, your friend will need to have your public key to decode it.
This cryptographic technique is comparatively a new method and it provides higher security. It is because the asymmetric encryption uses two separate keys for the encoding and decoding process. However, one major shortcoming of the asymmetric encryption is that it takes more time than the process associated with the symmetric encryption.
Private Key
The private key is although used with an algorithm to encode and decode data. But the primary need of this key is to decipher any information that is ciphered using the public key.
In data encryption, this private key is also known as a secret key and it must need to be kept confidential. It means, this secret key never needs to be transferred and thus there is no reason that it can be required by the third party.
Public Key
As the name infers, this key is available publically. It doesn’t require any security and is mainly used to encode information not to decode.
In this tutorial, I have explained the symmetric encryption and asymmetric encryption along with the examples in a very simple and transparent way.
That’s it.
