Python Forensics - Basic Forensic Application

For creating an application as per the Forensic guidelines, it is important to understand and follow its naming conventions and patterns.

Naming Conventions

During the development of Python forensics applications, the rules and conventions to be followed are described in the following table.

Constants Uppercase with underscore separation HIGH_TEMPERATURE
Local variable name Lowercase with bumpy caps (underscores are optional) currentTemperature
Global variable name Prefix gl lowercase with bumpy caps (underscores are optional) gl_maximumRecordedTemperature
Functions name Uppercase with bumpy caps (underscores optional) with active voice ConvertFarenheitToCentigrade(...)
Object name Prefix ob_ lowercase with bumpy caps ob_myTempRecorder
Module An underscore followed by lowercase with bumpy caps _tempRecorder
Class names Prefix class_ then bumpy caps and keep brief class_TempSystem

Let us take a scenario to understand the importance of naming conventions in Computational Forensics. Suppose we have a hashing algorithm that is normally used for encrypting data. The one-way hashing algorithm takes input as a stream of binary data; this could be a password, a file, binary data, or any digital data. The hashing algorithm then produces a message digest (md) with respect to the data received in the input.

It is practically impossible to create a new binary input that will generate a given message digest. Even a single bit of the binary input data, if changed, will generate a unique message, which is different than the previous one.


Take a look at the following sample program which follows the above-mentioned conventions.

import sys, string, md5   # necessary libraries
print "Please enter your full name"
line = sys.stdin.readline()
line = line.rstrip()
md5_object =
print md5_object.hexdigest()   # Prints the output as per the hashing algorithm i.e. md5

The above program produces the following output.

Naming Convention Example

In this program, the Python script accepts the input (your full name) and converts it as per the md5 hashing algorithm. It encrypts the data and secures the information, if required. As per forensic guidelines, the name of evidences or any other proofs can be secured in this pattern.

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