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Is there any way to derive the message from ECDSA Signature value, like online tools or with PHP for test only, because I have this Signature MEUCIH+9yjWRCSWYVW1Tk6hLE91iR8NiVetvz17C3k6ZTJo8AiEAiHe6OK7iyxjUVjpU5RKZjgXgWYP5LjdFsoE5GTB4cIA= and want to know the message and public key using PHP or any online tools just for test.

MK Said
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    With the signature, you cannot retrieve the message and the public key. A digital signature is a technique used to verify the authenticity and integrity of a message. You shall have the signature, the message and the public key. If one is missing, the verification cannot be performed. – Spomky-Labs Jul 22 '22 at 06:19
  • @Spomky-Labs thanks to guide me for the right answer :) – MK Said Jul 22 '22 at 10:02

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