Researchers created a sensor chip that signs images, video and audio as soon as the device records them. The signature records which camera or recorder made the file and when it was captured. It also shows if the file has been changed later.
Signatures can be saved in a public, unchangeable ledger, for example a blockchain, so anyone can compare and check a file. Social media platforms could verify uploads automatically.
The team made a working prototype but says more development is needed before commercial use.
Difficult words
- sensor chip — small electronic part that senses and records
- signature — digital mark that shows file origin and timeSignatures
- ledger — public record of data that cannot change
- blockchain — type of ledger that stores records in blocks
- prototype — first working model for testing a product
- verify — check that something is true or correct
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Would you trust a photo that has a digital signature? Why or why not?
- How could automatic verification on social media help people?
- What would you like to test in a new prototype like this?
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