Which tool conceals messages in text files by appending tabs and spaces to the ends of lines?

Which tool conceals messages in text files by appending tabs and spaces to the ends of lines?

• A. C++ Source-Code Steganography
• B. Snow
• C. OpenStego
• D. StegoStick

Answer: (A)

Trailing whitespace steganography hides a message by encoding data in the spaces and tabs placed at the end of each line. Snow is a tool built for this exact method: it takes a text file and a secret message, then appends spaces and tabs to line endings to represent the message, producing a stego-text that looks normal but contains hidden information. To read the hidden data, you use the corresponding decoder to interpret the trailing whitespace. Other tools target different carriers or techniques. For example, tools that hide data in source code use comments or whitespace within code, not the general trailing whitespace on ordinary text lines. OpenStego and StegoStick focus on hiding data in media like images or other formats, not the specific trailing-space method described here.

Trailing whitespace steganography hides a message by encoding data in the spaces and tabs placed at the end of each line. Snow is a tool built for this exact method: it takes a text file and a secret message, then appends spaces and tabs to line endings to represent the message, producing a stego-text that looks normal but contains hidden information. To read the hidden data, you use the corresponding decoder to interpret the trailing whitespace.

Other tools target different carriers or techniques. For example, tools that hide data in source code use comments or whitespace within code, not the general trailing whitespace on ordinary text lines. OpenStego and StegoStick focus on hiding data in media like images or other formats, not the specific trailing-space method described here.