ENHANCED MESSAGE-ID AS ELECTRONIC WATERMARK FOR ELECTRONIC MAIL FILTERING
First Claim
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1. An enhanced Message-ID for an email message produced by an enhanced Message-ID generator of an email system, the enhanced Message-ID comprising:
- a symbolic name used to identify the presence of an enhanced Message-ID header;
a timestamp value indicating when a modification was applied to the header;
an original value of the Message-ID header prior to modification; and
a textual representation of a one-way security hash generated from the timestamp value, the original Message-ID value prior to modification, and a secret phrase.
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Abstract
The present invention is directed to an enhanced Message-ID for an email message produced by an enhanced Message-ID generator and validator of an email system. The enhanced Message-ID comprises a symbolic name used to identify the presence of an enhanced Message-ID header, a timestamp value indicating when a modification was applied to the header, an original value of the Message-ID header, and a textual representation of a one-way security hash generated from the timestamp value, the original value, and a secret phrase.
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Citations
28 Claims
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1. An enhanced Message-ID for an email message produced by an enhanced Message-ID generator of an email system, the enhanced Message-ID comprising:
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a symbolic name used to identify the presence of an enhanced Message-ID header; a timestamp value indicating when a modification was applied to the header; an original value of the Message-ID header prior to modification; and a textual representation of a one-way security hash generated from the timestamp value, the original Message-ID value prior to modification, and a secret phrase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An email system of a sender for sending emails to, and receiving emails from, a recipient, the email system comprising:
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an enhanced Message-ID generator for enhancing a standard Message-ID header of an email of the sender to include an electronic watermark; a mail transfer agent for routing the email over a network to the recipient; and an enhanced Message-ID validator for validating whether an incoming email from the recipient contains a valid enhanced Message-ID created by the email system of the sender. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An enhanced Message-ID for a message produced by an enhanced Message-ID generator of a message system, the enhanced Message-ID comprising:
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a symbolic name used to identify the presence of an enhanced Message-ID header; a timestamp value indicating when a modification was applied to the header; an original value of the Message-D header prior to modification; and a textual representation of a one-way security hash generated from the timestamp value, the original Message-ID value prior to modification, and a secret phrase. - View Dependent Claims (26, 27, 28)
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Specification