Terisa Systems, a company formed last year to create security products for electronic commerce, has released a type of software that attaches "digital signatures" to documents sent on-line.

The product, SecureWeb Documents, contains an encryption device that is meant to ensure that documents sent over the Internet cannot be falsified or tampered with without detection.

By using the software, both the sender and the receiver of a document could ensure that the document was valid and could keep a record of its authenticity for later use.

Terisa officials said the product could be used to validate on-line bill payments, loan applications, stock trades, IRS filings, legal documents, and medical claims.

"While most other digital signature products are proprietary, SecureWeb Documents is an open application for digital signatures that follows our mission to provide standards-based solutions," said Allan Schiffman, chief technical officer for Terisa Systems.

"As soon as the certificate infrastructure is adopted worldwide, this product will be adopted, too," said Kenneth D. Mohr, product marketing manager. "This replaces the need for firewalls."

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