Identity-based-encryption message management system

• US 7,523,314 B2
• Filed: 12/22/2003
• Issued: 04/21/2009
• Est. Priority Date: 12/22/2003
• Status: Expired due to Fees

• Current Assignee: entIT Software LLC (Open Text Corporation)
• Original Assignee: Voltage Security Incorporated (HP Inc.)
• Inventors: Appenzeller, Guido, Spies, Terence
• Primary Examiner(s): Lipman; Jacob
• Application Number:
  US10/744,850
• Publication Number:
  US 20050138353A1
• Time in Patent Office: 1,947 Days
• Field of Search: 713/176, 713/153
• US Class Current: 713/176
• CPC Class Codes: H04L 2209/76 Proxy, i.e. using intermediary entity to perform cryptographic operations network architectures or network communication protocols using hop-by-hop encryption H04L63/0464
• CPC Class Codes: H04L 63/0442 wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption cryptographic mechanisms or cryptographic arrangements for public-key encryption H04L9/30
• CPC Class Codes: H04L 63/045 wherein the sending and receiving network entities apply hybrid encryption, i.e. combination of symmetric and asymmetric encryption cryptographic mechanisms or cryptographic arrangements using a plurality of keys or algorithms H04L9/14
• CPC Class Codes: H04L 9/3073 involving pairings, e.g. identity based encryption [IBE], bilinear mappings or bilinear pairings, e.g. Weil or Tate pairing

Abstract

Systems and methods for managing email are provided. Some of the email may be encrypted using identity-based-encryption (IBE) techniques. When an incoming IBE-encrypted message for a recipient in an organization is received by a gateway at the organization, the gateway may request an IBE private key from an IBE private key generator. The IBE private key generator may generate the requested IBE private key for the gateway. The gateway may use an IBE decryption engine to decrypt the incoming message. The decrypted message can be scanned for viruses and spam and delivered to the recipient. Outgoing email messages can also be processed. If indicated by message attributes or information provided by a message sender, an outgoing message can be encrypted using an IBE encryption engine and the IBE public key of a desired recipient.

Claims

1. A method of processing outgoing email messages from an organization, wherein the organization has a network, a gateway, a private key generator, and a plurality of users and wherein the gateway, the private key generator, and the users are connected by the network, the method comprising:

at a user, creating an email message to be sent to a recipient over the Internet;

providing information from the user to the gateway that indicates to the gateway whether or not the email message is to be encrypted using an identity-based-encryption (IBE) public key of the recipient;

at the gateway, receiving the information from the user that indicates that the email message is to be encrypted using the IBE public key of the recipient and, in response, using an IBE encryption engine and the IBE public key of the recipient to encrypt the email message; and

sending the IBE-encrypted email message to the recipient over the Internet.

2. The method defined in claim 1 further comprising scanning the email message at the gateway for viruses before using the IBE encryption engine to encrypt the message.