After completing this video, the learner will understand how to create and verify digital signatures.
- [Voiceover] Digital signatures provide…an electronic counterpart to physical signatures.…Digital signatures use asymmetric cryptography…to achieve the goals of integrity,…authentication, and non-repudiation.…When the recipient of a digitally signed message…verifies the message signature,…he or she knows three things.…First, that the person owning the public key…used to sign the message…is actually the person who created the message.…That's authentication.…
Second, that the message was not altered…after it was digitally signed by the creator.…That's integrity.…And finally, that the recipient could prove these facts…to a third party if necessary.…That's non-repudiation.…The use of digital signatures depends upon…two important concepts discussed earlier in this course.…First, that hash functions are collision-resistant.…For a strong hash function, you can't find two inputs…that produce the same output.…
Second, that anything encrypted with one key…from an asymmetric key pair…may only be decrypted with the other key…
This course is part of a six-course series on the CompTIA Security+ exam, and is useful for IT professionals who wish to learn more about information security as well as students preparing to take the Security+ exam.
We are now a CompTIA Content Publishing Partner. As such, we are able to offer CompTIA exam vouchers at a 10% discount. For more information on how to obtain this discount, please download these PDF instructions.
- Choosing encryption algorithms
- Applying symmetric and asymmetric cryptography standards
- Implementing key management, including key exchange and key stretching
- Working with public keys, trust models, and digital certificates
- Using transport encryption protocols
- Securing wireless networks
Skill Level Intermediate
2. Symmetric Cryptography
3. Asymmetric Cryptography
4. Key Management
5. Public Key Infrastructure
6. Transport Encryption
7. Wireless Security
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