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-<h1>crypt4gh WebAssembly demo</h1>
+<h1>crypt4gh browser demo</h1>
 
 <p><strong>This is a proof of concept to test client-side encryption of genomic data.</strong></p>
 
+<p>No data is transferred from your computer. All work happens on your local computer, in the web browser.</p>
+
 <h2>Encrypt your genomes</h2>
 
 <details>
