​KembaraXtra – Bharatiya Sakshya Adhiniyam (BSA) – Proof as to Verification of Digital Signature [Section 73 BSA / Section 73A IEA]
Introduction
​Section 73 of the Bharatiya Sakshya Adhiniyam, 2023 corresponds to Section 73A of the Indian Evidence Act, 1872. These provisions deal with verification and authentication of signatures, but they differ significantly because they address two different forms of evidence:

• Traditional physical signatures and writings, and
• Digital signatures and electronic authentication.

The provisions reflect the transition from conventional documentary evidence to technologically advanced digital evidence systems.

Meaning and Scope of the Provisions
Section 73A of the IEA
Section 73A dealt primarily with:

• Comparison of signatures,
• Handwriting,
• Seals,
• Traditional physical documents.

The Court could compare:

• Disputed signatures,
• Admitted signatures,
• Proven writings or seals,
  to determine authenticity.

The Court could also direct a person to:

• Write,
• Sign,
  in Court for comparison purposes.

Section 73 of the BSA
Section 73 specifically deals with:

• Verification of digital signatures.

The section provides that authenticity of a digital signature may be verified through:

• Production of a Digital Signature Certificate,
• Use of the public key mentioned in the certificate.

This reflects modern digital authentication mechanisms used in electronic transactions.

Difference in Method of Verification
Traditional Verification under IEA Section 73A
The method involves:

• Visual comparison,
• Handwriting examination,
• Signature comparison,
• Seal verification.

The Court may compare disputed signatures with:

• Admitted writings,
• Existing samples,
• Newly written samples in Court.

This method is largely manual and observational.

Digital Verification under BSA Section 73
Verification involves:

• Digital authentication tools,
• Cryptographic technology,
• Public key infrastructure,
• Digital Signature Certificates.

The process is technical and computerized.
The Court relies upon:

• Public key listed in the certificate,
• Certifying Authorities,
• Digital verification systems.

Technological Adaptation
BSA Section 73
The provision is specifically designed for:

• Electronic commerce,
• Online transactions,
• Digital communication,
• E-governance,
• Electronic contracts.

It reflects the increasing importance of:

• Cyber law,
• Digital evidence,
• Electronic authentication.

IEA Section 73A
The provision mainly dealt with:

• Physical documents,
• Manual signatures,
• Traditional evidentiary practices.

It was suitable for paper-based legal systems.

Role of Digital Authorities
Under Section 73 BSA
Verification may involve:

• Controller of Certifying Authorities,
• Certifying Authorities,
• Digital certification systems.

Thus, there is collaboration between:

• Judiciary,
• Digital regulatory authorities.

Under Section 73A IEAThe process depended primarily upon:

• Judicial comparison,
• Expert evidence,
• Handwriting examination.

No technological infrastructure was involved.

Practical Nature of Both Provisions
Section 73 BSA

• Technical,
• Digital,
• Certificate-based,
• Cyber-oriented.

Requires:

• Electronic tools,
• Encryption systems,
• Technical expertise.

Section 73A IEA

• Practical,
• Visual,
• Human observation-based.

Allows:

• Real-time writing or signature demonstration before Court.

Legal Importance
These provisions ensure:

• Authenticity of documents,
• Prevention of forgery,
• Reliability of evidence,
• Integrity of legal proceedings.

The shift toward digital verification reflects modernization of the Indian legal system.

Important Points 

• Section 73 BSA corresponds to Section 73A IEA.
• BSA focuses on digital signatures.
• IEA focused on physical signatures and writings.
• BSA uses:
  • Digital Signature Certificates,
  • Public key infrastructure,
  • Technical verification systems.
• IEA relied on:
  • Handwriting comparison,
  • Judicial observation,
  • Expert opinion.
• BSA reflects adaptation to digital technology and e-governance.

Difference between Section 73 BSA and Section 73A IEA
Section 73 BSA

• Deals with digital signatures.
• Requires digital certificates and public key verification.
• Technical and electronic process.
• Involves digital authorities.

Section 73A IEA

• Deals with physical signatures and writings.
• Based on comparison of handwriting or seals.
• Manual and observational process.
• Relies on Court comparison and expert testimony.

Conclusion
Section 73 of the Bharatiya Sakshya Adhiniyam, 2023 represents a major modernization of evidence law by introducing mechanisms for verification of digital signatures through technological and cryptographic methods. Unlike Section 73A of the Indian Evidence Act, 1872, which relied on traditional handwriting comparison, the BSA adapts the evidentiary framework to the realities of digital communication and electronic transactions. The provision reflects the growing importance of cyber technology and electronic governance in contemporary legal systems.