Block Cipher Principles: Stream Ciphers, Feistel Cipher, DES, AES
Module 3 – Block Cipher Principles – Stream Ciphers and Block Ciphers, Feistel Cipher, Feistel Decryption algorithm, The Data Encryption Standard, DES Decryption – Avalanche effect, The AES Cipher, substitute bytes transformation, Shift row transformation, Mix Column Transformation
Stream Ciphers and Block Ciphers: A stream cipher encrypts a digital data stream one bit or one byte at a time. ★ Examples of classical stream ciphers are the auto keyed Vigenère cipher and the Vernam cipher. A block
Read MoreUnderstanding the Intel 8086 Microprocessor: Architecture, Addressing Modes, and Interfacing
Intel 8086 System Bus Structure
The Intel 8086 microprocessor utilizes a system bus structure consisting of three primary buses:
- Address Bus: This unidirectional bus transmits addresses from the microprocessor to memory or I/O devices.
- Data Bus: This bidirectional bus carries data between the microprocessor and memory or I/O devices. The 8086 employs a 16-bit data bus, enabling 16-bit data transfers.
- Control Bus: This bus carries control signals that synchronize the microprocessor’s operation with other
Python Functions for 2048 Game Development
2048
def build_cells(dim: int) -> list[list[int]]:
cells = []
for i in range(dim):
cells.append([EMPTY] * dim)
return cells
def init(dim: int) -> dict:
assert dim is None or dim > 2, f’The minimum size is 3′
with open(FILE_CONFIG) as fconf:
conf = json.loads(fconf.read())
if dim is not None:
conf[‘dim’] = dim
else:
conf[‘dim’] = int(conf[‘dim’])
conf[‘max_score’] = int(conf[‘max_score’])
game = {
‘board’: build_cells(conf[‘dim’
Software Design Concepts and Principles: A Comprehensive Guide
Introduction
Software design is a critical aspect of software engineering, involving the high-level structure and organization of a software system. It encompasses various concepts and principles that guide the development of robust, scalable, and maintainable systems.
Software Architecture
Software architecture is the blueprint for a software system, defining its overall structure, components, and their interactions. It ensures that the system meets both functional and non-functional requirements,
Read MoreInformation Security: A Comprehensive Guide
What is Security?
Security refers to the state, quality, or condition of being safe and protected from threats. It encompasses the following aspects:
- Insurance: A state of being protected against potential loss or damage.
- Trustworthiness: The quality or characteristic of being reliable and dependable.
- Certainty: A firm belief or conviction in the truth or validity of something.
Information Security
Information security safeguards information from various threats to ensure business continuity, minimize
Read MorePython Code Examples: Data Structures, Algorithms, and Games
Python Code Examples
Data Structures
SNP Data Processing
def get_data(line: str) -> [str, str, set[str]]:
code, illnesses = line.split(':')
rs_code, nucleotid = code.split()
rs_code = rs_code.strip() # SNP
nucleotid = nucleotid.strip()
illnessset = set()
for illness in illnesses.split(','):
illnessset.add(illness.strip().lower())
return rs_code, nucleotid, illnesssetdef add_data(snp:dict,rs_code: str, code_n:str, pats: set)->None:
if rs_code in snp:
if nucleotid