Encryption has the potential of protecting the information regarding the consumers related to emails or other sensitive data and secure network connections. Currently, there are several options to chose from, and one must find the one which both secure and fulfills their requirements. Following are four encryption methods which can be adopted for securing valuable data:

## AES (Advanced Encryption Standard)

The AES is a symmetric encryption algorithm and is considered to be one of the security algorithms. The US government use this algorithm for protecting the classified data and different hardware or software products are used as well. Block Cipher is used in the AES for encrypting the data at a time as compared to other encryption algorithms like stream ciphers that encrypts the data bit by bit.

Advanced Encryption Standards consists of AES-128, AES-256, and AES-192 standards. The user can select the encryption standards such as 192 bits, 128 bits, etc. Around in the AES algorithm is considered a process to turn the plaintext into ciphertext and in this method, each bit key is involved with different rounds.

## 3 DES (Triple Data Encryption Standard)

3DES or Triple Data encryption standard is considered to be the current standard used for encrypting the data and it is used as a block cipher. This encryption standard is similar to the older encryption method to some extent however, it uses 56-bit keys for data encryption. Moreover, the Triple DES algorithm uses 3 different and individual 56-bit keys for encrypting the data three times. As this method involves the encryption of the data three times, hence is considered to be slower as compared to other encryption standards. However, several businesses and financial institutions use this encryption method for securing the information.

**Twofish**

This encryption method is based on the existing block cipher known as blowfish and this encryption method is considered to be a symmetric block cipher method. This encryption method involves the use of bit range from 128-bits block size to 256-bits. This range of bits works well with the hardware and smaller CPUs. This encryption method is similar to the Advanced Encryption Method and several rounds of encryption are implemented in this method for converting the plaintext into ciphertext. However, the size of the key does not vary with the number of rounds. Moreover, the Twofish method helps in providing significant flexibility for selecting different keys.

## RSA (Rivest-Shamir Adelman Algorithm)

This algorithm uses public key cryptography for sharing data over an insecure network and is named after three key persons involved with this encryption which includes Len Adelman, Ron Rivest, and Adi Shamir. Two types of keys are used in this encryption algorithm which includes the private key and public key. The public key can be accessed by anyone, however, the private key can be accessed only by the authorized persons and must be kept confidential. While using the RSA algorithm, there us need to use both the keys for encrypting and decrypting the message. As per the Search Security, RSA algorithm is considered to be more secure because large integers are associated with it which are the product of 2 large prime numbers. Moreover, the size of the key which is associated with it is large which enhances the security and the RSA keys that are used mostly for securing the data include 2048-bits and 1024-bits. However, the increase in the length of the size of the key does not depict that the algorithm becomes slower as compared to other encryption methods.

Encryption-Decryption method is used for ensuring proper privacy and as the information is transmitted over the internet, it becomes important to scrutinize the access from illegitimate individuals or organizations. Because of this, the data is encrypted for reducing the loss of data as well as data theft. Some of the common items which are encrypted include email messages, text files, user data, images, and directories. The recipient associated with the decryption receives a prompt for entering the password and accessing the encrypted data. The data is captured by the system for performing decryption and transforming it into words or images which can be understood easily not only by the reader but also by the system. Decryption can be done automatically or ever manually. Moreover, it can also be performed using a set of passwords or keys. There are several methods of cryptography which are used for securing the data and one of the most significant and popular methods is the Hill Cipher Encryption as well as

Decryption. A random matrix is generated by this method which is important for ensuring proper security. The inverse of the matrix is required in decryption in the matrix of Hill Cipher. Hence, one of the common issues which arise in the decryption is that Matrix's inverse does not exist in several scenarios. The content cannot be decrypted easily if the matrix is not invertible. This issue is eliminated completely in the modified algorithm of hill cipher.