ICEGATE
DIGITAL SIGNATURE
CERTIFICATE
PROCESS DOCUMENT
Version – 1.0
OFFICE OF: THE ADDITIONAL DIRECTOR GENERAL, ICEGATE,
C. R. BUILDING, I. P. ESTATE, NEW DELHI
Version Control
Version
(x.yy)
1.0
Date of
Revision
18-Mar-15
Description of
Change
First version
Reason for Change
Approved Version
Affected
Sections
NA
Approved
By
CBEC
Table of Contents
1.
Introduction ............................................................................................................................ 4
2. Digital Signature Certificate ....................................................................................................... 5
2.1 Contents of a Digital Certificate............................................................................................. 6
2.2 Defined Classes ......................................................................................................................7
2.3 PKI ..........................................................................................................................................7
3. Enabling PKI in ICEGATE .......................................................................................................... 8
3.1 Integration of PKI component ............................................................................................... 8
3.2 PKI Component functionalities............................................................................................. 8
4. Digital Signature implementation framework ..........................................................................10
4.1 Digital Signature implementation phases ............................................................................10
5. Benefits of Digital Signature implementation .......................................................................... 12
1. Introduction
Indian Customs EDI Gateway (ICEGATE) is the gateway for the users of Indian
Customs EDI system. All the Individuals (Importers/Exporters/CHAs/Airlines/Shipping
Lines/Shipping Agents etc.), trade partners (Banks/Custodians/PQIS/FSSAI etc.) or
Govt.
Agencies
(Ministry
of
Valuation/DGFT/CRIS/CONCOR/Ministry of Steel etc.)
Commerce/DGCI&S/DG,
connect ICEGATE for
documents filing (BE/SB/IGM/EGM/CGM etc.), data sharing under Customs Business
Process (several information shared through messages with the help of Server to Server
SFTP communication system) or for administrative, statistical, analytical or policy
making purpose through SFTP in automated environment. It provides Remote EDI
Services (RES) to the trade and industry for filing documents, data exchange, e-payment,
status enquiry, document tracking, query-reply etc.
In recent past, ICEGATE has been observing challenges on account of
impersonation of Identity of the registered user, tracing the identity of user, misuses of
credibility of accredited clients etc. Further, Sec. 5 if the IT Act, 2000 envisages that the
electronic documents, which are supposed to be signed by a person in case it is filed in a
hard copy, must be singed digitally by the person authorized to sing it. Hence data
exchange and acceptability of documents received through RES has imminent need to
implement digital signature for the documents/ messages receiving / forwarding
electronic to and fro the customs business partners, stakeholders and other Govt.
Agencies. Further, demand from the trade and industry, several associations and other
Ministries have been received for making Customs EDI business process paperless.
To overcome the aforesaid challenges implementation of Digital Signature
Certificate at ICEGATE is very important. It shall authenticate the identity, maintain
users and data related integrity, support non-repudiation and prevent frauds. We may
subsequently stop giving print to the importers/CHA/Exporter and provide digitally
signed electronic copy only. This would inter-alia help in saving forests at a large level
and increase trust in system.
2. Digital Signature Certificate
In cryptography,
a public
key
certificate (also
known
as
a digital
certificate or identity certificate) is an electronic document that uses a digital
signature to bind a public key with an identity — information such as the name of a
person or an organization, the address, and the email address. The certificate can be
used to verify that a public key belongs to an individual.
In a typical public-key infrastructure (PKI) scheme, the signature will be of a certificate
authority (CA). In a web of trust scheme, the signature is of either the user (a self-signed
certificate) or other users ("endorsements"). In either case, the signatures on a certificate
are attestations by the certificate signer that the identity information and the public key
belong together.
A Digital signature will include a message/ document which is signed with the
sender's private key, upon signing a hash value is generated which is transmitted with
the message. On receiving the message is deciphered by user who has access to the
sender's public key. The verification proves that the sender had access to the private key,
and therefore is likely to be the person associated with the public key. This also ensures
that the message has not been tampered with, as any manipulation of the message will
result in changes to the encoded message , which otherwise remains unchanged between
the sender and receiver.
DSC FRAMEWORK
Version
User
Name
Signature
Algorithm
Signing by
using CA’s
Public Key
User Certificate
Users
Public
Key
Serial Number
CRL
Cred
CRL entia
ls
CA Name
Validity
User Name
Public Key
Verification
& Integration
Signature of issuer
Extension
2.1 Contents of a Digital Certificate

Serial Number: Used to uniquely identify the certificate.

Subject: The person, or entity identified.

Signature Algorithm: The algorithm used to create the signature.

Signature: The actual signature to verify that it came from the issuer.

Issuer: The entity that verified the information and issued the certificate.

Valid-From: The date the certificate is first valid from.

Valid-To: The expiration date.

Key-Usage: Purpose of the public key (e.g. decipherment, signature, certificate
signing...).

Public Key: The public key.

Thumbprint Algorithm: The algorithm used to hash the public key certificate.

Thumbprint (also known as fingerprint): The hash itself, used as an abbreviated form
of the public key certificate.
2.2 Defined Classes

Class 1 for individuals, intended for email.

Class 2 for organizations, for which proof of identity is required.

Class 3 for servers and software signing, for which independent verification and
checking of identity and authority is done by the issuing certificate authority.

Class 4 for online business transactions between companies.

Class 5 for private organizations or governmental security.
2.3 PKI
PKI (Public key Infrastructure) is an arrangement in cryptography that facilitates third
party examination of, and vouching for, user identities.PKI allows the binding of public keys to
users. These public keys are most frequently stored in cartificates. This binding of public keys to
users is usually carried out by software in a central location, in coordination with other
associated software components installed in distributed locations.
3. Enabling PKI in ICEGATE
3.1 Integration of PKI component
PKI Component should be added in the application to make application PKI enabled. As
PKI component executes at client side, it should be added in the application such a way that it
makes component downloadable at client side. PKI component can be embedded in the web
pages using its tags. When component is embedded to the web page, it will expose few
component specific JavaScript functions to the web page. Web pages can communicate with the
embedded component by calling JavaScript functions.PKI Component provides following
functionalities
3.2 PKI Component functionalities
Certificate Selection: PKI component retrieves the list of all installed certificate at client
side, display it in a pop up box and allow user to select a certificate from list. Certificate
Verification: After Selection of
certificate, component will perform validation on selected
certificate such as:

Date verification

Certificate Chain Verification

ROOT CA verification

CRL verification

Is Private Key Exists
Data OR File Signing: The user shall utilize any class – III PKI DSC for signing documents.
He will use web-based Common Singer Component while signing documents. This component
shall verify CRL also at the time of signing. It will share credentials of user, CA, validation and
Public Key in encrypted form along with Hash Value.
Data OR File Verification: Application will provide Original data, hash & public key of
Signer certificate to component, using all above information component will verify signature on
data. If original data/file or signature is tempered verification will be failed.
Encryption: Application provides component a public key with which data needs to be
encrypted. Component will process Public Key & Original data (Or user entered Data) &
generate encrypted representation of original data.
Decryption: Application provides component an encrypted data, component will pop up a
certificate dialog, which allows user to select certificate private key. After selection component
will verify the certificate & retrieve private key. Using private key & encrypted data component
can reproduce original data.
4. Digital Signature implementation framework
ICEGATE receives inbound documents from various individual users like importers,
Exporters, CHA etc. and send outbound messages to various agencies like DGFT, DGCI&S,
PQIS, FSSAI etc. The framework of Digital Signature in automated environment of ICEGATE is
different from other normal framework, so keeping in view workflow and specific functionalities
of ICEGATE it was required to create specific architecture of Digital Certificate implementation.
It was also required to have a DSC which could be operated in automated environment without
any interference of human being.
The normal Digital Signature issued on the name of an individual was not function for
outbound messages which are send by ICEGATE system. Considering the unique requirement of
ICEGATE system Controller of Certifying Authority(CCA) introduced a new type of Digital
Certificate with name “ Organization Document Signer Certificate” in September,2014. The
implementation of DSC was planned in phased manner.
4.1 Digital Signature implementation phases
The implementation of Digital Signature is ICEGATE has been envisaged in following
two phases:
i.
Phase 1 - Implementation of certificates for individual users: All Importers,
Exporter, Customs Brokers, Shipping Lines, Airlines or their agents who are authorized
to file any document through Remote EDI System at ICEGATE will have to use the Class
3 Digital Signature Certificates for digitally signing the Customs Documents (Bills of
Entry, Shipping Bills, IGM, EGM, CGM) before submitting them to ICEGATE for
processing.
Keeping in view the different platforms of RES utilities deployed by users and to
avoid delay in submission of documents at ICEGATE level, web-based Common Signer
Component has been provided to the users through ICEGATE website for signing all the
Customs Documents. The Web-based Common Signer available free of cost to all the
users through ICEGATE portal supported by M/s (n)Code. It is platform neutral and
verifies validity, CRL etc. at the time of signing. This component may be used with any
Class – III DSC valid issued by any CA.
The user authorized for signing documents shall use DSC in his name and execute
signing process and send the Digitally signed documents to ICEGATE. On receiving the
digitally signed documents the ICEGATE server side verifier shall verify the user’s
credentials, validity of certificate, CAs credentials, Public Key and CRL status and Hash
Value of certificate and integrated the data with ICES database. Validation of credentials
of the person who sings document, sends document and the CHA who files the
documents would be completed in the process. Records of digitally signed documents
shall be preserved for legal purpose if any.
ii. Phase 2 - Implementation of Certificates for server to server
communication: In the phase DSC will be implemented for all the agencies with which
server to server communication is done by the Department for all inbound and outbound
messages.
ICEGATE will digitally sign all outbound messages with Organizational
Document Signer DSC, which was introduced by CCA keeping into view the specific
requirement of ICEGATE system.
5. Benefits of Digital Signature implementation
The following are the key benefits
of implementing digital signature for ICEGATE
inbound messages:
i.
Authentication -. Digital signatures are used to authenticate the source of
messages. The ownership of a digital signature key is bound to a specific user
and thus a valid signature shows that the message was sent by that user.
ii.
Integrity – With Digital certificates it can ascertained that the message has
not been altered during transmission. Digital Signatures provide this feature
by using cryptographic message digest functions
iii.
Non Repudiation – Digital signatures ensure that the sender who has
signed the information cannot at a later time deny having signed it . In case of
legal issues user can be held liable for documents received from him.
iv.
Tracking: A digitally signed document can easily be tracked and located in a
short amount of time.
v.
Environment friendless: By implementing Digital signature lot of paper
can be saved, which in turn may reduce the number of trees which are cut for
making the paper.