How do Digital Timestamps Support Digital Signatures?
Submitted by: AdministratorConsider two questions that may be asked by a computer user as he or she views a digital document or on-line record. (1) Who is the author of this record - who wrote it, approved it, or consented to it? (2) When was this record created or last modified?
In both cases, the question is one about exactly this record-exactly this sequence of bits - whether it was first stored on this computer or was created somewhere else and then copied and saved here. An answer to the first question tells who & what: who approved exactly what is in this record? An answer to the second question tells when & what: when exactly did the contents of this record first exist?
Both of the above questions have good solutions. A system for answering the first question is called a digital signature scheme. Such a system was first proposed in and there is a wide variety of accepted designs for an implementation of this kind of system.
Submitted by: Administrator
In both cases, the question is one about exactly this record-exactly this sequence of bits - whether it was first stored on this computer or was created somewhere else and then copied and saved here. An answer to the first question tells who & what: who approved exactly what is in this record? An answer to the second question tells when & what: when exactly did the contents of this record first exist?
Both of the above questions have good solutions. A system for answering the first question is called a digital signature scheme. Such a system was first proposed in and there is a wide variety of accepted designs for an implementation of this kind of system.
Submitted by: Administrator
Read Online Cryptography General Job Interview Questions And Answers
Top Cryptography General Questions
☺ | What is a Linear Feedback Shift Register? |
☺ | Is DSA Secure? |
☺ | What are Interactive Proofs and Zero-Knowledge Proofs? |
☺ | Is RSA Patented? |
☺ | What is the Quantum Cryptography? |
Top Cryptographer Categories
☺ | Cryptography General Interview Questions. |
☺ | Typesetter Interview Questions. |
☺ | Ciphers Interview Questions. |
☺ | Cryptography Teacher Interview Questions. |
☺ | Typewriter Interview Questions. |