Data Encryption Methods

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AES (Advanced Encryption Standard):

• A symmetric key encryption algorithm widely used worldwide.

• Usage: Protecting user data, encrypting database contents, and securing communication between servers.

• Where: Commonly used in data storage and transmission processes, especially where high-speed encryption and decryption are needed.

from Crypto.Cipher import AES
key = b'Sixteen byte key'
cipher = AES.new(key, AES.MODE_EAX)
ciphertext, tag = cipher.encrypt_and_digest(b'Hello World')

DES (Data Encryption Standard):

• An older symmetric key encryption algorithm, now considered less secure.

• Usage: May be used for legacy system compatibility.

• Where: Less likely in new developments, but possibly in maintaining or interfacing with older systems.

from Crypto.Cipher import DES
key = b'8bytekey'
cipher = DES.new(key, DES.MODE_EAX)
ciphertext = cipher.encrypt(b'Hello World')

3DES (Triple Data Encryption Standard):

• An enhancement of DES, it applies the DES cipher algorithm three times to each data block.

• Usage: Encrypting data transmitted over the internet, especially in user authentication and securing communication channels.

• Where: Used in areas like user login processes, secure email communications, and in SSL/TLS protocols for web security.

from Crypto.Cipher import DES3
key = DES3.adjust_key_parity(b'Sixteen byte key')
cipher = DES3.new(key, DES3.MODE_EAX)
ciphertext = cipher.encrypt(b'Hello World')

RSA (Rivest–Shamir–Adleman):

• A widely used asymmetric encryption algorithm.

• Usage: Encrypting smaller datasets due to their block cipher nature, or in applications where changing keys frequently is beneficial.

• Where: Might be employed in specific internal applications or for encrypting individual files or messages.

from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_OAEP
key = RSA.generate(2048)
cipher = PKCS1_OAEP.new(key.publickey())
ciphertext = cipher.encrypt(b'Hello World')

Blowfish:

• A symmetric block cipher known for its speed and effectiveness.

• Usage: Enhancing the security of RSA encryption, particularly in sensitive data transmission.

• Where: Utilized in similar contexts as RSA, but where additional padding security is desired.

from Crypto.Cipher import Blowfish
key = b'An arbitary key'
cipher = Blowfish.new(key, Blowfish.MODE_EAX)
ciphertext = cipher.encrypt(b'Hello World')

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In a project like UniAPT, which deals with sophisticated technologies and potentially handles a significant amount of sensitive data, the application of these encryption methods is crucial. They not only provide data security but also ensure compliance with various data protection regulations, instilling trust among users and stakeholders.