14.Generate and Use a Digital Signature

A digital signature is a mathematical technique used to validate the authenticity and integrity of a digital message. The purpose of a digital signature is to prevent tampering and impersonation in digital communications. In many countries, including the United States, digital signatures have the same legal significance as traditional forms of signed documents. The United States Government now publishes electronic versions of budgets, laws, and congressional bills with digital signatures.
A digital signature algorithm consists of a signature creation and signature verification process. User A generates the digital signature and User B verifies the signature using the verification process. Both the signer and the verifier have a public and private key that they use to complete each process.
In this lab, you will use the toolkit OpenSSL to generate a digital signature. You will then generate a document, sign it with the digital signature, and then validate the authenticity and integrity of the document. Finally, you will change the document and then validate that the document is no longer authentic because its integrity has been compromised.

Objectives
 Use OpenSSL to generate a digital signature.
 Sign a document with the digital signature.
 Verify that a signed document has been changed.

Link
Brief: https://mega.nz/file/aw1jCDbS#TV8j2hgQcn0wWX0QKVYIgS7mtOaiYwfxsmz8B2TE6YA
Oracle Virtual Box: https://www.virtualbox.org/
LabVM: https://skillsforall.com/resources/lab-downloads

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