Simplified AES from information security

AES architecture

1. Introduction to Simplified AES Simplified AES is a streamlined version of the Advanced Encryption Standard, a widely used symmetric-key algorithm for secure data transmission. This introduction provides an overview of the key aspects of this efficient encryption method. Presented By: M Hasham Tahir F-67019 Shehriyar Ali F-67020

2. Overview of AES Algorithm 1 Input Plaintext The input data to be encrypted is first converted into a standardized format. 2 Key Expansion The encryption key is expanded into multiple round keys for the encryption process. 3 Encryption Rounds The data undergoes multiple rounds of substitution, permutation, and key-dependent transformation.

3. Key Generation 1 Key Expansion The original encryption key is expanded into multiple round keys using a key schedule algorithm. 2 Key Size Simplified AES supports 128-bit, 192-bit, and 256-bit encryption keys, providing flexible security levels. 3 Key Derivation The round keys are derived from the original key through a series of transformations.

4. Encryption Process Initial Round The plaintext is combined with the first round key through a bitwise XOR operation. Substitution The data undergoes a non-linear substitution step using predefined S-boxes. Permutation The data is then rearranged through a linear mixing operation known as the MixColumns step. Key Addition The transformed data is combined with the next round key, repeating the process for multiple rounds.

5. Decryption Process Inverse Rounds Decryption reverses the encryption process, applying the inverse transformations in reverse order. Key Schedule The same key expansion algorithm is used to generate the decryption round keys. Plaintext Recovery The final output of the decryption process is the original plaintext message.

6. Advantages of Simplified AES Efficiency Simplified AES is computationally efficient, making it suitable for resource-constrained environments. Security The algorithm provides strong encryption and is resistant to known cryptanalysis techniques. Flexibility Simplified AES supports multiple key sizes, allowing for customizable security levels. Widespread Adoption AES is a widely accepted and standardized encryption algorithm, ensuring broad compatibility.

7. Applications of Simplified AES Data Encryption Securing sensitive information, such as financial transactions and personal data. Secure Communications Protecting data transmitted over networks, including VPNs and wireless protocols. Embedded Systems Implementing encryption in resource-constrained devices, such as IoT sensors and smart cards. Cloud Security Encrypting data stored and processed in cloud computing environments.

8. Conclusion and Key Takeaways Simplified Efficiency Streamlined design with reduced computational complexity. Robust Security Strong encryption capabilities and resistance to cryptanalysis. Flexible Key Sizes Supports multiple key lengths for customizable security levels. Widespread Adoption Widely accepted and standardized encryption algorithm.