Smuggling arbitrary data through an emoji (paulbutler.org)

Article summary

The article discusses how arbitrary data can be encoded in a single emoji using Unicode variation selectors, allowing for the hiding of data in plain sight. This method can be used to watermark text or sneak data past human content filters. The author provides examples of how to encode and decode data using this method. The technique has potential implications for security and privacy, particularly in regards to link sharing and text analysis.

Main themes

• Unicode encoding
• Data hiding
• Text watermarking
• Security implications
• Link sharing
• Text analysis

What commenters say

• The ability to add watermarks to text using Unicode variation selectors is a potentially useful tool for tracking the origin of leaked information.
• Some commenters argue that this method is not secure and can be easily detected, while others see potential uses for it in signing documents or verifying quotes.
• There is disagreement over whether large language models can actually decode the hidden messages, with some arguing it's just a lucky guess and others providing examples of successful decoding.
• The technique has implications for link sharing, as it may be possible to hide data in links that appear innocent, potentially compromising user privacy.
• Some commenters propose alternative methods for watermarking text that may be more effective and less detectable.
• The use of Unicode variation selectors for data hiding raises concerns about the potential for abuse, such as sneaking malware or tracking data past security filters.
• There is discussion about the limitations and potential vulnerabilities of this method, including the possibility of detection through statistical analysis or other means.