Electronic Postmarks
The United States Postal Service (USPS) Electronic Postmark (EPM©) is a proprietary variation of the Digital Postmark issued by the USPS. It was introduced in 1996 by the U.S. Postal Service as a service offering that provides proof of integrity and authentication for electronic transactions, and is being applied to email by ePostmarks, Inc. (See ePostmarks Homepage).
Through the USPS EPM web-based service, any third-party can verify the authenticity of electronic content. This electronic proof, postmarked by the Postal Service, provides evidence to support non-repudiation of electronic transactions. The EPM is designed to deter and detect the fraudulent tampering or altering of electronic data.
Read more about this topic: Digital Postmarks
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