What are Digital Signatures and How Are They Beneficial?
A digital signature is a rendition of a value that can be added, tagged onto electronic data. It is intended and included, with a key purpose to provide evidence, of its source, origin, creator. Authenticating and confirming that it was done by someone who has a specific private key, to code/encode, a source to be trusted, not a risk or threat. Providing Host Evidence for assemblies for example would be a good application for this. Authentication, authorization type processes, other verification processes use these to provide access, permission and allow certain actions to be performance (based on those security policy and guidelines), confirmed ‘identity’ and sourcing this contains. It enables how to identify users and what they can do. It is an evidence type. It unique identifies, requiring signing of files for example.
It is useful to determine whether files are authentic, not tampered with and if they are/can be trusted. This is where digital signatures and file signing can work/help.
A cryptography class. It can use public-key algorithms. It reveals who the sender is and ensures the data integrity, as the signature can be verified and checked by anyone (DSA and RSA cryptography classes are using different algorithms, but with similar function and end-results) There are four methods to handle digital signatures: SignHash, SignData, VerifyHash, VerifyData. There are also separate methods for signing and verifying processes. It uses asymmetric encryption, (see elsewhere). Both the public key and digital signatures are stored as variables. It can be accessed for use in the System.Security.Cryptography namespace.
Key Exam Points
- Nature, Scope, Creation and Application, Benefits and Use Digital Signatures (C# and VB,.NET Frameworks)
- Review the chapters, content and references on application domain and services, encrypting and decrypting data, user and data security.
- For the exam, study practical, hands-on, illustrative and real-life, scenarios and examples for Digital Signatures, that help you to gain a better understanding of this topic, construct and related aspects
- Take the practice test exam, sample questions (Multiple Choice, Application Type Labs)
Related Terms
Asymmetric Encryption, Symmetric Encryption, Host Evidence, Assembly Evidence, Permission, Authentication, Authorization, Signature.
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