Anh Duc Vo, 563234 Cropley Ave, San Jose, CA 95132

8443193, May 14, 2013

Aug 19, 2010

12/859738

Daniel T. Dreymann - Palo Alto CA, US
Stephan Brunner - Lafayette CA, US
Yoel Gluck - San Francisco CA, US
Anh Vo - Sunnyvale CA, US

Barracuda Networks, Inc. - Campbell CA

H04L 9/32

713168, 713155, 713156, 713157, 713158, 713159, 380229, 705 67

A hash module of a mail sender creates a hash data context structure. The hash module processes the headers and the body of an e-mail message in the order required, for example by the DKIM specification, until the data to be hashed has been input. The hash module converts the context structure into printable characters and the encoded structure is transmitted over the Internet or other network to the next participating system. The token authority's hash module decodes the context back into binary form. After ensuring business logic is satisfied, it generates additional headers required for signature, which are then added to the developing hash. The hash module finalizes the hash function and creates the hash value. The authorization module creates the signature and returns it to the e-mail module, which attaches the signature to the message and transmits it to the destination mailbox provider, which verifies the token.

2009010, Apr 23, 2009

Oct 20, 2008

12/254831

Daniel T. Dreymann - Palo Alto CA, US
Stephan Brunner - Lafayette CA, US
Anh Vo - Sunnyvale CA, US
Yoel Gluck - Mountain View CA, US

G06F 11/00

726 23

Certification of embedded content in e-mail is provided. A sender wishing to have code certified for inclusion in e-mail sends the code to a token authority. A code verification engine acting automatically or in conjunction with an analyst examines the code to determine whether it poses a risk of harm to e-mail recipients. If not, the token authority issues a certificate for the embedded content. The mail sender sends e-mail to recipients including the embedded content, and the certification is sent in conjunction with the content itself. A mailbox provider inspects the received e-mail to determine whether it includes embedded content and, if so, whether a certification is attached that the embedded content is not harmful. If not, or if the message includes uncertified content in addition to certified content, then the message is rejected, or delivered with a warning that certification is not present.