Steganography
Steganography is the art and science of hiding data within other data or media, such that it is not imperceptible to an observer. Unlike encryption, which focuses on making data unreadable to unauthorized parties, steganography aims to make the data itself undetectable. Steganographic techniques include hiding data in image, audio, or video files using least-significant-bit (LSB) manipulation, or embedding payloads within network protocol headers. In many cases, steganography is used along with encryption for added layers of security. Security professionals must be aware of steganographic techniques to protect their systems from unauthorized data exfiltration and infiltration of malicious content.
Full Guide on Steganography for CISSP Cryptography
What is Steganography?
Steganography is a branch of cryptography that focuses on the concealment of data within other data. Unlike traditional cryptography methods which aim to obfuscate data, steganography is interested in hiding the very existence of the data.
Why is it Important?
Steganography is crucial because it provides an additional level of security by making the data itself seems invisible, thereby reducing the risk of detection. It is invaluable where encrypting information attracts undue attention.
How does Steganography work?
Steganography works by replacing bits of useless or unused data in regular computer files (such as graphics, sound, video or even plain text) with bits of different, invisible information. This information can be plain text, cipher text, or even images.
Exam Tips: Answering Questions on Steganography
Understanding the basics of what steganography is and how it is used is key. Ensure to familiarize yourself with various types of steganography - image, audio, video and text. Be aware that steganography can be used alongside encryption for added security. When presented with a practical situation in the exam, pay close attention to the data file being used and the information that needs to be hidden. Also, an understanding of steganographic tools can be advantageous.
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