Discussion 3
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University of the Cumberlands *
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535
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Information Systems
Date
Feb 20, 2024
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docx
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Uploaded by DoctorFly2464
Data Encryption Standard (DES) was developed in the early 1970s by a group of IBM
cryptographers and with the collaboration of NSA it was proposed as the national encryption
standard in 1977. DES encrypts plaintext by dividing it down into smaller sections and using a
cryptographic key to decrypt it. It transforms a readable message, block by block, into
incomprehensible words that can only be decoded by the holder of the decryption key. The DES
algorithm is a block cipher, thus it does not encrypt all of the data at once. Instead, it divides
the data into blocks, making encryption faster and more secure. In 2001, the National Institute
of Standards and Technology (NIST) accepted Rijndael as an alternative to DES. The Advanced
Encryption Standard (AES) succeeded DES as the approved standard in 2002 (Zenarmor, 2023).
Triple DES is a type of encryption algorithm that improves security by using a three-layered
encryption mechanism. The 56-bit key size of DES was considered insufficient for modern
security requirements, thus NIST launched a study to establish a new encryption standard that
was more secure than DES. The encryption process of Triple DES involves generating three
unique keys using a key derivation algorithm; subjecting the 64-bit plaintext to an initial
permutation; encrypting the plaintext three times using a different key in order to create three
layers of encryption; and applying a final permutation to the output thus producing the
ciphertext. The decryption process of 3DES is the reverse of the encryption process, with the
ciphertext being fed into the algorithm and the steps being performed in reverse order
(Nagaraj, 2023). Triple DES is commonly used to encrypt data at rest and in motion in a variety of industries and
network protocols. While it has some limitations, such as slower speed and limited key size
options, it is still widely used in many applications, such as financial transactions, healthcare
systems, and government communications. According to draft guidelines provided by NIST in
2018, Triple DES is officially being retired. The guidelines propose that Triple DES be deprecated
for all new applications and disallowed after 2023. This decision was made after a research
exploited a known vulnerability to collision assaults; which are greatest during lengthy
transmissions, the exchange of content files, or transmissions susceptible to text injection
(Cobb, 2023).
References
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Zenarmor. (2023). What is Data Encryption Standard (DES)? https://www.zenarmor.com/docs/network-security-tutorials/what-is-data-encryption-
standard-des#data-encryption-standard-history
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Nagaraj, K. (2023).
https://cyberw1ng.medium.com/triple-des-3des-encryption-
features-process-advantages-and-applications-2023-587e5a092789
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Cobb, M. (2023). What is Triple DES and why is it being disallowed?
https://www.techtarget.com/searchsecurity/tip/Expert-advice-Encryption-101-Triple-
DES-explained#
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