Configuration
Collapse menu
Fixed sidebar
Top navbar
Top navbar v.2
*Primary layout
Boxed layout
Fixed footer
Skins
Cracking Codes with Python: An Introduction to Building and Breaking Ciphers

AUTHOR: Al Sweigart

PUBLISHER: No Starch Press

PAGES: 416

ISBN-10: 1593278225; ISBN-13: 978-1593278229

Learn how to program in Python while making and breaking ciphers—algorithms used to create and send secret messages!

After a crash course in Python programming basics, you’ll learn to make, test, and hack programs that encrypt text with classical ciphers like the transposition cipher and Vigenère cipher. You’ll begin with simple programs for the reverse and Caesar ciphers and then work your way up to public key cryptography, the type of encryption used to secure today’s online transactions, including digital signatures, email, and Bitcoin.

Each program includes the full code and a line-by-line explanation of how things work. By the end of the book, you’ll have learned how to code in Python and you’ll have the clever programs to prove it!

You’ll also learn how to:

- Combine loops, variables, and flow control statements into real working programs
- Use dictionary files to instantly detect whether decrypted messages are valid English or gibberish
- Create test programs to make sure that your code encrypts and decrypts correctly
- Code (and hack!) a working example of the affine cipher, which uses modular arithmetic to encrypt a message
- Break ciphers with techniques such as brute-force and frequency analysis

There’s no better way to learn to code than to play with real programs. Cracking Codes with Python makes the learning fun!

About the Author
Al Sweigart is a professional software developer who teaches programming to kids and adults. He is the author of Automate the Boring Stuff with Python, Invent Your Own Computer Games with Python, and Scratch Programming Playground, also from No Starch Press. His programming tutorials can be found at inventwithpython.com.

Book Category

Android Developer / Asp.Net / Asp.Net MVC / Blockchain / C# / C++ / Computer Science / Database / Game Developer / Java / JavaScript / jQuery / Linux / Maven / MS Sql / MySQL / Networking / Oracle / PHP / Python / Spring / VB.Net / Visual Studio / Web Developer

LATEST BLOG POST

HRIS: Payroll Process

The payroll process involves calculating and disbursing employee salaries, wages, and benefits on a regular basis. Stay updated with employment laws, tax regulations, and other relevant compliance requirements to ensure accurate payroll processing and avoid penalties or legal issues.

HRIS: Timekeeping Process

Implementing an effective timekeeping process helps ensure accurate payroll calculations, compliance with labor laws, and fair compensation for employees' work hours. It also provides valuable data for analyzing workforce productivity and resource allocation.

HRIS: Recruitment and Training

Recruitment and training should be ongoing processes to attract and retain top talent and ensure the team is equipped with the necessary skills and knowledge to meet organizational goals.

HRIS: Human Resources

Human resources (HR) is a crucial department within an organization that focuses on managing and developing the people who work for the company. The HR department is responsible for various functions related to employee recruitment, hiring, training, performance management, benefits administration, and employee relations.

Understanding the Basics of Payroll Processing

Payroll processing is the administrative task of calculating and distributing employee salaries and benefits. It involves several steps, including collecting and verifying employee time and attendance data, calculating wages and deductions, and generating paychecks or direct deposits.

DTR Timekeeping Tips: Do's and Don'ts

Employers must keep accurate records of non-exempt employees work hours to comply state and local laws. This straightforward process can become complex when employees start work early or leave late, travel for business, participate in company trainings, and use mobile devices to remain connected to work after-hours.

Employee Timekeeping: Tool to Improve Efficiency and Accuracy

Overall, implementing a reliable timekeeping tool can significantly improve efficiency and accuracy in employee time tracking. It streamlines processes, reduces errors, ensures compliance, and provides valuable data for decision-making.

Automate Loans Deduction using Payroll Setup

By following these steps, you can automate loan deductions using payroll setup, saving time and ensuring accuracy in loan repayments for your employees.

Transforming HR into Digital Through Technology

By embracing technology and digitizing HR processes, organizations can streamline operations, improve employee experience, and enable HR professionals to focus on strategic initiatives that drive business success.

Timekeeping and Attendance Setup

Specific setup and configuration of your timekeeping and attendance system will depend on the unique needs and requirements of your organization. It's important to adapt these steps to fit your specific circumstances and consult with HR professionals or software providers for guidance.