AlgoAnchor

Anchoring is the method of notarizing data in an immutable & verifiable way.

AlgoAnchor allows you to store a limited text message or the 'fingerprint' of message/file on the Algorand blockchain. A 'fingerprint' is a cryptographically generated unique hash of the data, even the tiniest change to the input message/file will completely change the fingerprint. Fingerprints are stored as a base64 encoded string.

Anchoring gives a point of reference to ensure an indisputable proof-of-integrity exists at a given time.

Types of Anchors
Text Anchor	Your short message will be stored on the blockchain. The message is encoded in base64, but is viewable in plain text. Limited to 1000 bytes.
File Anchor	A hash of the selected file is created using the md5 algorithm, and then is stored in the Algorand blockchain as a base64 string. Only the fingerprint is anchored, not the contents of the file. The fingerprinting process is entirely done on the local machine, the file is never uploaded to AlgoAnchor servers.
Both Transaction and Fingerprint references are required for anchor verification

Anchoring on the Algorand Mainnet requires the AlgoSigner extension, created by Purestake group. You can find out more about AlgoSigner on their website - https://www.purestake.com/technology/algosigner

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