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Tumbleweed Communications Corp. Patents
Assignee:
Tumbleweed Communications Corp.
Address:
Redwood City, CA
No. of patents:
23
Patents:












Patent Number Title Of Patent Date Issued
7401356 Method and system for e-mail message transmission July 15, 2008
An e-mail firewall applies policies to e-mail messages transmitted between a first site and a plurality of second sites. The e-mail firewall includes a plurality of mail transfer relay modules for transferring e-mail messages between the first site and one of the second sites. Policy
7389413 Method and system for filtering communication June 17, 2008
A e-mail relay provides message filtering services to an e-mail network. The e-mail relay monitors incoming communication and intercepts e-mail messages. The e-mail relay compares attributes of the messages to data derived from SPAM messages, which is stored in a SPAM database. The e
7380274 E-mail firewall May 27, 2008
An e-mail firewall (105) applies policies to e-mail messages (204) between a first site and a plurality of second sites in accordance with a plurality of administrator selectable policies (216). The firewall comprises a simple mail transfer protocol (SMTP) relay (202) for causing the
7356834 Solicited authentication of a specific user April 8, 2008
Secure web-based messaging according to a "push" paradigm is augmented by specific, intended recipient authentication. In particular, a document can be sent to a specified, intended recipient through the Web using e-mail recipient notification, and the recipient is authenticated prior
7257564 Dynamic message filtering August 14, 2007
Dynamically filtering and classifying messages, as good messages, bulk periodicals, or spam. A regular expression recognizer, and pre-trained neural networks. The neural networks distinguish "likely good" from "likely spam," and also operate at a more discriminating level to distingu
7162738 E-mail firewall with stored key encryption/decryption January 9, 2007
An e-mail firewall (105) applies policies to e-mail messages (204) between a first site and a plurality of second sites in accordance with a plurality of administrator selectable policies (216). The firewall comprises a simple mail transfer protocol (SMTP) relay (202) for causing the
7127741 Method and system for e-mail message transmission October 24, 2006
An e-mail firewall applies policies to e-mail messages transmitted between a first site and a plurality of second sites. The e-mail firewall includes a plurality of mail transfer relay modules for transferring e-mail messages between the first site and one of the second sites. Policy
7117358 Method and system for filtering communication October 3, 2006
A e-mail relay provides message filtering services to an e-mail network. The e-mail relay monitors incoming communication and intercepts e-mail messages. The e-mail relay compares attributes of the messages to data derived from SPAM messages, which is stored in a SPAM database. The e
7073056 Apparatus and method for demonstrating and confirming the status of digital certificates and oth July 4, 2006
Methods and apparatuses for providing cryptographic assurance based on ranges as to whether a particular data item is on a list.
6912285 Mechanism for efficient private bulk messaging June 28, 2005
Secure bulk messaging mechanism in which, roughly described, a sender first encrypts a message once. The message can be decrypted with a message decryption key. These can be symmetric or asymmetric keys. For each recipient, the sender then encrypts the message decryption key with the
6901509 Apparatus and method for demonstrating and confirming the status of a digital certificates and o May 31, 2005
Methods and apparatuses for providing cryptographic assurance based on ranges as to whether a particular data item is on a list. According to one computer-implemented method, the items on the list are sorted and ranges are derived from adjacent pairs of data items on the list. Next,
6826609 Policy enforcement in a secure data file delivery system November 30, 2004
A server interacts with a sender to form a package which can include one or more attached data files to be sent to one or more recipients, and the server applies a policy established by a policy authority of the sender to the package. Since the server both forms the package through inter
6725381 Solicited authentication of a specific user April 20, 2004
Secure web-based messaging according to a "push" paradigm is augmented by specific, intended recipient authentication. In particular, a document can be sent to a specified, intended recipient through the Web using e-mail recipient notification, and the recipient is authenticated prior to
6609196 E-mail firewall with stored key encryption/decryption August 19, 2003
An e-mail firewall (105) applies policies to e-mail messages (204) between a first site and a plurality of second sites in accordance with a plurality of administrator selectable policies (216). The firewall comprises a simple mail transfer protocol (SMTP) relay (202) for causing the
6529956 Private, trackable URLs for directed document delivery March 4, 2003
A document delivery architecture dynamically generates a private Uniform Resource Locator (URL) to distribute information. Each private URL ("PURL") uniquely identifies an intended recipient of a document, the document or set of documents to be delivered, and (optionally) other param
6516411 Method and apparatus for effecting secure document format conversion February 4, 2003
A method and apparatus is provided for effecting secure document delivery in any of various document formats. A document is encrypted with the public key of a server associated with the recipient of the document, instead of with the public key of the intended recipient. The receiving
6502191 Method and system for binary data firewall delivery December 31, 2002
A method and system sends documents from a desktop computer inside an intranet through a series of firewalls and/or proxy servers to a server residing on the Internet. A computer in an intranet system protected by a firewall or proxy server uses a software application to access the I
6487599 Electronic document delivery system in which notification of said electronic document is sent a November 26, 2002
An electronic document delivery system and methods of its use are provided. A document preferably in a portable format is forwarded to a remote server (e.g. using HTTP to "push" the document to the server). The server sends a generic notification of the document to an intended recipient
6470086 Method and apparatus for effecting secure document format conversion October 22, 2002
A method and apparatus is provided for effecting secure document delivery in any of various document formats. A document is encrypted with the public key of a server associated with the recipient of the document, instead of with the public key of the intended recipient. The receiving
6385655 Method and apparatus for delivering documents over an electronic network May 7, 2002
A method and apparatus are provided for securely delivering documents over an electronic network while preserving document formatting. The invention also provides security that restricts access to the system to an authorized user. A document is sent from a sending computer to a dedicated
6192407 Private, trackable URLs for directed document delivery February 20, 2001
A document delivery architecture dynamically generates a private Uniform Resource Locator (URL) to distribute information. Each private URL ("PURL") uniquely identifies an intended recipient of a document, the document or set of documents to be delivered, and (optionally) other param
6119137 Distributed dynamic document conversion server September 12, 2000
A document delivery server dynamically customizes the format of a document to be delivered, based on the capabilities of the recipient and the type of document to be delivered. The server enables transparent delivery of formatted documents, regardless of the capabilities of the recipient
6061448 Method and system for dynamic server document encryption May 9, 2000
A method and system are provided for secure document delivery over a wide area network, such as the Internet. A sender directs a Delivery Server to retrieve an intended recipient's public key. The Delivery Server dynamically queries a certificate authority and retrieves the public key.

 
 
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