Digital signatures

A Digital Signature Is A Mathematical Scheme For

Demonstrating The Authenticity Of A Digital Message Or

DocumentPrepared by Tejashree Bangera

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A Valid Digital Signature gives a Recipient Reason to believe that the Message was created by a Known Sender, such that the Sender cannot Deny having sent the Message and that the Message was not Altered in Transit

Uses

Usesὄ Authentication- Digital signatures can

be used to authenticate the source of messages.

ὄ Integrity- , the sender and receiver of a message may have a need for confidence that the message has not been altered during transmission

ὄ Non-repudiation- By this property, an entity that has signed some information cannot at a later time deny having signed it.

PROCESS SIMPLIFIED

SACHIN

SACHIN’S PUBLIC KEY

SACHIN’S PRIVATE KEY

Anyone can get Sachin’s Public

Key, but He keeps his

Private Key to himself

ROHIT VIRAT DHONI

ROHIT can encrypt a message using SACHIN's Public Key. SACHIN's uses his Private Key to decrypt the message. Any of SACHIN's Friends might have access to the message ROHIT encrypted, but without Sachin’s Private Key, the data is worthless.

"Hey Sachin, how about a game at the Eden Garden. I hear they have free entry!"

HNFmsEm6Un BejhhyCGKOK JUxhiygSBCEiC 0QYIh/Hn3xgiK BcyLK1UcYiY lxx2lCFHDC/A

HNFmsEm6Un BejhhyCGKOK JUxhiygSBCEiC 0QYIh/Hn3xgiK BcyLK1UcYiY lxx2lCFHDC/A

"Hey Sachin, how about a game at the Eden Garden. I hear they have free entry!"

Sachin now passes the document on to Dhoni.

AdvantagesAuthenticates Your Identity Electronically

Provides You With A High Level Of Security For Your Online Transactions

Absolute Privacy Of The Information Exchanged Using A Digital Certificate.

Use Certificates To Encrypt Information Such That Only The Intended Recipient Can Read It.

You Can Digitally Sign Information To Assure The Recipient That It Has Not Been Changed In Transit

Verifies Your Identity As The Sender Of The Message`

For Secure Email And Web-Based Transactions, Or To Identify Other Participants Of Web-Based Transactions

To Prove Ownership Of A Domain Name And Establish SSL/ TLS Encrypted Secured Sessions Between Your Website And The User For Web Based TransactionsAs A Developer, For Proving Authorship Of A Code And Retaining Integrity Of The Distributed Software Programs

For Signing Web Forms, E-Tendering Documents, Filing Income Tax Returns, To Access Membership-Based Websites Automatically Without Entering A User Name And Password Etc.

News!!! News!!!Birth and death certificates issued by BMC could soon be signed by the health officers concerned through digital signatures if a proposal passed on to the administration is passedThe digital signatures will be password-protected and health officers can approve applications online at a convenient time, making it possible to authorise applications faster.

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ENTIRE OBJECT SIGNATURES This Type Of Signature Includes All But A Few Nonessential Bytes Of The Object.CORE OBJECT SIGNATURES This Type Of Signature Includes The Essential Bytes Of The *CMD Object. However, The Signature Does Not Include Those Bytes That Are Subject To More Frequent Changes. This Type Of Signature Allows Some Changes To Be Made To The Command Without Invalidating The Signature.

TYPES OF DIGITAL SIGNATURES

Misuse Of Trusted Time Stamping- Since Automated Date Is Included, The Reader Cannot Be Certain That The Signer Did Not Backdate The Date And Time Of The Signature.Non-Repudiation-Even If The User Wants To Make Changes To A Signed Document Then Alteration Will Make It Invalid. Hence A New Message Has To Be Drafted.

Disadvantages

IDRBT Certificate

Paper Electronic

Digital Signatures depend on a digital object, hence they are susceptible to fraud.

And reliability includes more than authenticity and integrity. Accuracy and trust also play an important role in the

authentication of records. However, due to this new technology, there is an introduction

of online file movement system, e-commerce, online money orders, and even E-voting might be the next step in future.

Assurance of Reliability is a never ending process that starts on the creation or receipt , and must be maintained during the entire life cycle.

CONCLUSION