Cryptgraphy

A downloadable collection of scenario-based Cybersecurity practical Python scripts transcribed from the supplied Scenario Based CIS PDF.

Install

PyPI distribution name: cryptgraph. The installed command remains cryptgraph.

pip install cryptgraph

Commands

cryptgraph list
cryptgraph list --category cloud-security
cryptgraph download confidentiality
cryptgraph download secure-communication
cryptgraph download cloud-security
cryptgraph download all

A single-script download writes a .py file to the current directory. Category downloads create a folder containing that category's scripts. all downloads the complete collection.

Use -o to choose a destination:

cryptgraph download confidentiality -o confidentiality.py
cryptgraph download all -o my_cyber_practicals

Categories

• CIA: confidentiality, integrity, availability, authentication/accountability, non-repudiation
• OS Security: authentication/permissions, firewall logs, memory management, buffer overflow
• Secure Communication: RSA key generation, sender, receiver
• Database Security: SQL injection prevention, role-based access control
• Network Security: replay attack prevention
• Cloud Security: time-limited links, zero-trust client encryption, invisible watermarking
• IoT Security: packet sniffing, AES encryption
• Security Practices: HMAC verification, port scanning/banner checks

Dependencies

The downloaded scripts use the dependencies required by their original examples:

pip install cryptography
pip install pycryptodome
pip install scapy

Most other examples use only the Python standard library. Install only the dependency required by the practical you want to run.

Important notes

• The script logic, identifiers, statements, and printed messages are retained from the PDF; indentation was normalized where needed so the Python files parse.
• These are educational demonstrations, not production-ready security systems. Some examples use hard-coded demo credentials or keys and simplified cryptographic concepts.
• The RSA sender/receiver example imports generated keys from generate_keys.py; because that module generates fresh in-memory keys when imported in a new process, running the scripts as separate processes does not provide persistent matching keys without additional key-persistence work. The original example has been retained as requested.
• Packet sniffing is intended only for networks and devices you own or are explicitly authorized to inspect. On Windows, Scapy may require Npcap and elevated permissions.
• The port-scanning example should only be run against systems you own or have explicit permission to test.

Build locally

python -m pip install --upgrade build
python -m build