Is a Giovanni watermark a form of “digital signature” or “digital fingerprint”?
Yes. In their own way, Giovanni watermarks are really both a digital signature and a digital fingerprint. In a similar manner to encryption, Giovanni can use digital signatures. The process of embedding a watermark into a digital sample stream, is not a digital signature calculation as is executed in public key cryptographic systems. The information encoded by Giovanni is digitally signed, however, to certify the validity of the information when it is extracted. In so-called assymetric, or public-key cryptography, a file encoded with the “private” key of a user’s key pair can only be decoded with a correlative “public” key. That scheme gives correspondents assurance of information’s origin. The concept is known as non-repudiation. [See Giovanni in Action for an explanation of the signing sequence.] This aspect of Giovanni’s proprietary security differentiates itself from other watermarking schemes in that attempts at watermark erasure cause a digital signature check to fail, thus tampe
Related Questions
- Is there any time limit for submitting Form ITR-V (ITR Verification Form), when the return is filed electronically without digital signature, to the Income-tax Department?
- Do I need the original unwatermarked data to extract a Giovanni watermark from a copy?
- Is a Giovanni watermark a form of "digital signature" or "digital fingerprint"?
