The document proposes a blockchain-based system to validate digital certificates. Some key points: - The existing system of certificate issuance has security and forgery issues due to the lack of an effective verification mechanism. - The proposed system uses blockchain to securely store certificate data and hashes on an immutable ledger. It issues, stores, and allows retrieval and verification of certificates through a common portal. - The system has modules for certificate upload, security/authentication via hashing and digital signatures, and verification of certificates by anyone using the transaction ID and hash stored on the blockchain. - This new system reduces the possibilities of forgery and ensures security, validity, and confidentiality of graduation certificates.

1. SUBMITTED BY: UNDER THE GUIDENCE OF :
R.VASANTHAKUMAR Ms .S .VINOTHINI AP/CSE
M.VIMALRAJ
DATE : 21.06.2022

2. Aim
 To validate the digital certificate through
using blockchain.

3. DOMAIN : BLOCK CHAIN
 A blockchain is a distributed database.
 blockchain stores information electronically
in digital format.
 Blockchains are best known for their crucial
role in cryptocurrency systems, such
as Bitcoin.
 maintaining a transaction is very secured
 decentralized record of transactions.

4. EXISTING SYSTEM
 According to various researches about one
million graduates passing out each year, the
certificate issuing authorities are seems to
be compromised for the security credentials
of student data.
 Due to the lack of effective anti forge
mechanism, events that cause the
graduation certificate to be forged often get
noticed.

5. DISADVANTAGE
 Less security
 Miss use the certificate
 There can be incidents where students may
produce the fake certificate and it is difficult
to identify them.

6. PROPOSED SYSTEM
 Our system is being proposed to issue, store
and retrieve university certificates through
a common portal.
 Companies can retrieve valid certificates of
students through this portal through
permission from both the student and the
institution that’s hosting the certificates.
 The hashes of the certificates are stored in
block chain.

7. ADVANTAGEs
 More secured.
 The certificate is hashed.

8. ALGORITHM
 Secured Hash Algorithm (SHA-2).
 It is used for cryptographic security.

9. ARCHITECTURE

10. LITERATURE SURVEY
1.ethereum
 Ethereum is an open and decentralized
platform
 Incorruptible
 Secure
 Permanent

11. 2.A Secure E-Qualification Certificate System
 The development of the system will adopt
the SOA of the eframework to meet the
distributed stakeholder user case.
 SOA allows developers to build applications
from sets of services.

12. 3.AUTHORIZATION AND DELEGATION
ON BLOCKCHAIN
 This scheme is implemented in the form of smart
contracts over the Ethereum platform.
 It enables the user to audit authorization operations
and inspect how access control is actually performed.

13. 4. Graduation Certificate Verification Model
 The university, the graduate and the verifier
are the three parties involved in the
proposed solution in order to accomplish
accurate certificate verification.
 Internal benefits
 External benefits

14. MODULES
 Certificate Upload
 Security and authentication module
 Verification module

15. CERTIFICATE UPLOAD
 To create the block chain based
unmodifiable certificates, initially the
university needs to get registered.
 Each university will be having its wallet
address from which it is going to send
transaction.
 University can be added only by the owner
of the smart contract

16. SECURITY AND AUTHENTICATION
MODULE
 Once added the university can access the
system and can create certificates with data
fields.
 Each created certificate will be stored in the
Inter planetary file system (IPFS)
 which in turn will return the unique hash
generated using SHA-256 algorithm.
 This will serve as unique identity for each
document.

17. VERIFICATION MODULE
 Anyone can use this transaction id to verify.
 the certificate details and can view the
original copy of certificate using IPFS hash
stored along with data.
 it is almost impossible to modify this
certificate or to create fake certificate with
same data.
 Hence with this we can solve the problem of
counterfeit certificates

18. USER CASE DIAGRAM

19. SYSTEM REQUIREMENTS
Hardware Requirements
Hard disk : 1 TB
RAM : 4 GB
Processor : Core i3
Monitor : 15” Color Monitor
Software Requirements
Front –End : Java,XML
Back end : Fire Base DB
Operating System : Windows 10
IDE : Android Studio

20. CONCLUSION
 Various technologies have been discussed to
reduce the incidence of certificate forgeries
and ensure that the security, validity and
confidentiality of graduation certificates,
even though there are many limitations
regarding the security and privacy of data. A
new block chain-based system reduces the
certificate forgery.

21. REFERENCE
[1] A. M. Antonopoulos, Mastering Bitcoin: Unlocking
Digital. Sebastopol, CA, USA: O’Reilly Media, 2015.
[2] C. K. Wong and S, S. Lam “Digital signatures for flows
and multicasts”, WEEE/ACM Transactions on
Networking,7(4):504-513,1999.
[3] M. Carvalho and R. Ford, “Moving-target defenses for
computer networks,”IEEE Security & Privacy, vol. 12, no.
2, pp. 73-76, Mar.- Apr.2014.
[4] M. Warasart and P. Kuacharoen,
“Paper-based Document Authentication
using Digital Signature and QR Code,” no. Iccet, 2012.