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Comodo Digital Signatures Protect Contents of Email Messages

Jersey City, NJ, May 28, 2009 – When emailed documents will be needed later as legal proof, the person producing them needs to be able to swear that they have not been altered. Comodo Secure Email Pro offers a way to protect the contents of an email from alteration in transit.

Email’s ease and utility, which allows internal users, partners and customers to communicate effectively, also puts confidential information in reach of those who want to profit from it. To a moderately skilled person, inside the organization or out, unsecured email is easy to read, impersonate and alter, and is not much different from a postcard written in pencil.

Digital signatures on email documents represent a one-way hash (encryption) of the message content that uses the sender’s public and private key pair. This process creates a “signature” that only the sender’s public key can decrypt. The recipient, using the sender’s public key, can then validate the sender as well as the integrity of message contents. The sender’s digital signature will be un-trusted by the recipient’s email program if either the message content or sender’s digital certificate are invalid.

The Secure Email Pro signing procedure automates the digital signature process, and attaches the “signature” to the out-going document to be emailed. CSE Pro also checks and validates incoming signed documents using the reverse process.

Because the computer tenaciously pairs the digital signature to one saved version of the document, it is nearly impossible to repudiate a digitally signed document.

Comodo Secure Email Pro is an install-and-forget software application that can automatically digitally sign all outgoing messages without the need to pre-exchange passwords or public certificates. For further protection, email documents can also be encrypted, making them unintelligible to anyone but the intended recipient.

For more information about Comodo Secure Email Pro, visit


Comodo CA, Ltd., is the world’s second-largest issuer of high-assurance Digital Certificate, providing online communications unreadable to anyone but the sender and the recipient.

Comodo CA, Ltd., provides cost-effective solutions that protect online information. Digital Certificate enable secure sockets layer (SSL) communications, unreadable to anyone but the sender and the recipient. Code-signing certificates ensure that software is not tampered with.

Patent-pending Comodo CA technology enables Internet users to send encrypted emails without exchanging public keys beforehand.

Continual innovation, a core competence in digital encryption, and a commitment to halting Internet crime distinguish the Comodo companies. The Comodo companies secure and authenticate online transactions and communications for over 200,000 business customers, and it has over 15,000,000 installations of desktop security products.

Comodo CA, Ltd., — Creating Trust Online®. For more information, visit our website.

About Comodo

The Comodo companies provide the infrastructure that is essential in enabling e-merchants, other Internet-connected companies, software companies, and individual consumers to interact and conduct business via the Internet safely and securely. The Comodo companies offer PKI SSLCode SigningContent Verification and Email Certificate; award winning PC Security software;  Vulnerability Scanning services for PCI Compliance; secure e-mail and fax services.

Continual innovation, a core competence in PKI, and a commitment to reversing the growth of Internet-crime distinguish the Comodo companies as vital players in the Internet’s ongoing development. Comodo secures and authenticates online transactions and communications for over 200,000 business customers and 3,000,000 users of our desktop security products.

For additional information on Comodo – Creating Trust Online® visit

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