What is the difference between Encryption and Hashing?
When it comes to data security, hashing and encryption are the two most crucial foundational operations. Both of these techniques transform the raw data into an entirely different format. The terms Hashing and Encryption are often used in the domain of data security, but do you know what is the difference between encryption and hashing?
Some individuals mistakenly use the two terms as equivalents, but hashing and encryption are two separate (though related) techniques. Let’s understand the basic difference between hashing and encryption in tabular form.
Difference between hashing and encryption in tabular form -
| Basis | Hashing | Encryption |
| Meaning | It is a 2-way process that takes plain text and converts it into a cipher text. It is reversible, meaning encrypted data can be converted back to plain text. | It is a one-way process where plain text is converted to digest using a salt. It is considered to be non-reversible. |
| String Length | The length of the converted string will not change. | There is no certainty that the length of the original data and the length of the encrypted characters will be the same. |
| Function | It cannot be reversed. It only works in one way. | It can be reversed only by the use of a decryption key. It’s a two-way process. |
| Usage | It is used in several digital applications, including digital signatures, file transfers, passwords, and more. | Digital certificates, electronic mail, and other forms of digital communication all employ encryption. |
| Keys | Since hashing is a one-way function, there is no need to use a key to decode the message. | Encryption is keyed. In the case of symmetric encryption, a public key is generated and given to the recipient so that they may decode the message. With asymmetric encryption, the recipient is given their own private key. |
| Algorithms | MD4, SHA, MD5, etc. | AES, ECC, RSA, etc. |
| Purpose | The goal of hashing is to protect the integrity of data. | The goal of encryption is to keep the confidentiality of data. |
| Types | Identity Hashing, Digit Folding, and Division Hashing | Symmetric and Asymmetric encryption |
Moving on, in this blog, we explain the best possible answer to the question what is the difference between encryption and hashing?
What is the difference between Encryption and Hashing?
Encryption is a bidirectional process; plaintext is the input, and cypher text is the output. Due to the bidirectional nature of Encryption, the data may be decrypted and made legible once again. In contrast, hashing is a one-way process, and the plaintext is converted into a one-of-a-kind digest using salt, and the original is subsequently irreversible in the hashing process. While it is theoretically possible to reverse a hash, the amount of computing power required to do so renders the process impractical.
These are the common difference between encryption and hashing. Moving on, let’s take a deep dive and understand what encryption is.
What is Encryption?
Encryption is a two-way function where data is passed in as plaintext and comes out as cipher text. Encryption is a process where the normal text data which normally we as humans can read is converted into data that is unreadable by humans and technology, and we call it to cipher text. It is designed to protect sensitive data, whether the data is over the internet or the data is inside an offline device. The process of Encryption typically involves the following steps:
- The plaintext, or unencrypted data, is transformed using a mathematical algorithm called a cipher.
- The resulting data is called the cipher text, which is not readable by anyone without the proper decryption key.
- The decryption key is used to transform the cipher text back into its original plaintext form.
Encryption is used to protect data from being accessed or modified by unauthorized parties and is a critical component of computer and network security.
Types of Encryption
Here are the different types of encryptions that are used –
Symmetric Encryption
This type of Encryption uses a key for the Encryption and decryption of data, and the key is the same in both ways either encrypt or it’s decrypt. Also, this key which we generate should be shared on both sides, either source or destination and if the Encryption is between multiple users so users must have the same key which is generated for Encryption. This symmetric Encryption is majorly used because, with this kind of Encryption, a large amount of data is encrypted in a small amount of time using the secret key which is being generated.
In this category of Symmetric Encryption, two more types of sub-categories are there -
- Block Algorithms
- Stream Algorithms
Some examples of symmetric algorithms are -
RC4 (Rivest Cipher 4)
RC5 (Rivest Cipher 5)
RC6 (Rivest Cipher 6)
AES (Advanced Encryption Standard) -Mostly used now!
DES (Data Encryption Standard)
Asymmetric Encryption
In this kind of Encryption, there are two keys used for the encryption process one is the private key, and the second is your public key. It’s more secure as compared to symmetric Encryption because here, the private key is used by users or the nodes who generate the key pair, whereas the public key is used by the user who wishes to send the encrypted data to the user who has the private key.
Many protocols rely on asymmetric Encryption, which includes the TLS & SSL protocols. These keys are very long in length with large number mathematical numbers and paired together to make the Encryption more reliable, so the hackers can’t decrypt the data.
Examples of asymmetric keys -
Rivest Shamir Adleman (RSA)
Digital Signature Standard (DSS)
Digital Signature Algorithm (DSA)
Elliptical Curve Cryptography (ECC)
Now that we have seen what is encryption, it is time to move on to understand what is hashing.
What is Hashing?
Hashing is a process that takes plain data as input and provides the output by doing some mathematical functions. We often call this mathematical function hash value, message digest (MD), or thumbprint as message digest we also see in the routing protocol authentications where plain text and MD5 are there. The input can be of any size and the hash is typically much smaller, often a fixed number of characters.
Hashing is used for a variety of purposes, including verifying the integrity of data, generating unique identifiers, and creating a non-reversible representation of a password. In the context of computer security, hashing is often used to store passwords in a secure manner, as it is not possible to determine the original password from the hash.
It is computationally infeasible to retrieve the original input from the hash since hashing algorithms are intended to have one-way functions. There is a wide variety of hashing algorithms to choose from, and they all have their advantages.
Hashing Algorithms
Some common hashing algorithms include
- MD5 (Message Digest)
- SHA-1 (Secured Hashing Algorithm-1)
- SHA-2 (Secured Hashing Algorithm-2)
- SHA-3 (Secured Hashing Algorithm-3)
- Whirlpool
We hope after these explanations, you have a better clarity of the differences between encryption and hashing.
Conclusion
Data security relies on the use of encryption and hashing. Both encryption and hashing have advantages and disadvantages and are commonly used in combination to provide further protection for sensitive data.
Encryption and hashing operations adhere to the two components of the triangle in information security, which are confidentiality and integrity. This blog provides a brief overview of what is the difference between encryption and hashing. It also draws attention to the subtle differences between them and shines a light on the ways in which their unique features open varied doors for their area of application or usage. Check out our Courses at - https://linktr.ee/pynet_labs