Guide
What Is Steganography?
Steganography hides the existence of a message by embedding it inside an ordinary-looking carrier such as text, an image, metadata, or another digital artifact.
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Guide
What Is Invisible Unicode?
Invisible Unicode refers to characters that are present in a text string but do not produce an ordinary visible glyph, or primarily control formatting and text behavior.
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How Can HTML Hide Text?
HTML can contain text and attributes that exist in source or the DOM without appearing as ordinary visible page text. CSS can also make rendered text effectively imperceptible.
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What Is Hidden Information in Metadata?
Metadata is information that describes an artifact rather than forming its primary visible content. It can include titles, authors, descriptions, comments, timestamps, and format-specific fields.
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What Is Base64?
Base64 is a reversible binary-to-text encoding that represents bytes using a restricted printable alphabet. It is not encryption.
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What Is Machine-Readable Hidden Text?
Machine-readable hidden text is information that software can recover from code points, structure, metadata, source, or other representations even when a human does not naturally perceive it.
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What Is Word-Length Steganography?
Word-length steganography hides data by mapping odd and even word lengths to symbols, creating a secondary channel inside otherwise readable prose.
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What Is Synonym-Choice Steganography?
Synonym-choice steganography hides data by selecting among curated context-appropriate word alternatives according to a shared codebook.
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What Is Punctuation Steganography?
Punctuation steganography hides data by mapping predefined punctuation choices at known carrier positions to symbols such as binary 0 and 1.
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What Is Contraction Steganography?
Contraction steganography hides data by mapping curated full-form and contracted wording at known carrier positions to symbols such as binary 0 and 1.
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What Is Active/Passive Voice Steganography?
Active/passive voice steganography hides data by mapping curated grammatical-voice alternatives at known carrier positions to symbols such as binary 0 and 1.
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What Is Sentence-Order Steganography?
Sentence-order steganography hides data by mapping curated orderings of the same fact pair, such as A→B and B→A, to symbols such as binary 0 and 1.
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What Is Sentence-Length Steganography?
Sentence-length steganography hides data by mapping a deterministic measurement of each carrier sentence, such as odd or even alphabetic word count, to symbols such as binary 0 and 1.
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What Is Spelling-Variant Steganography?
Spelling-variant steganography hides data by choosing among predefined orthographic variants according to a synchronized codebook and carrier order.
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How Do You Prove a Hidden Machine-Readable Channel Exists?
A defensive evidence ladder for moving from an unusual representation or decoded pattern to a reproducible, causally supported claim that a machine-readable secondary channel exists.
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