WO2003017559A3 - Systems and methods for identity-based encryption and related cryptographic techniques - Google Patents

Systems and methods for identity-based encryption and related cryptographic techniques Download PDF

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Publication number
WO2003017559A3
WO2003017559A3 PCT/US2002/027155 US0227155W WO03017559A3 WO 2003017559 A3 WO2003017559 A3 WO 2003017559A3 US 0227155 W US0227155 W US 0227155W WO 03017559 A3 WO03017559 A3 WO 03017559A3
Authority
WO
WIPO (PCT)
Prior art keywords
receiver
key
sender
identity
message
Prior art date
Application number
PCT/US2002/027155
Other languages
French (fr)
Other versions
WO2003017559A2 (en
Inventor
Dan Boneh
Matthew Franklin
Original Assignee
Univ Leland Stanford Junior
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Leland Stanford Junior filed Critical Univ Leland Stanford Junior
Priority to AT02794941T priority Critical patent/ATE465571T1/en
Priority to AU2002332671A priority patent/AU2002332671A1/en
Priority to DE60236094T priority patent/DE60236094D1/en
Priority to EP02794941A priority patent/EP1425874B1/en
Priority to JP2003521528A priority patent/JP2005500740A/en
Publication of WO2003017559A2 publication Critical patent/WO2003017559A2/en
Publication of WO2003017559A3 publication Critical patent/WO2003017559A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0838—Key agreement, i.e. key establishment technique in which a shared key is derived by parties as a function of information contributed by, or associated with, each of these
    • H04L9/0847—Key agreement, i.e. key establishment technique in which a shared key is derived by parties as a function of information contributed by, or associated with, each of these involving identity based encryption [IBE] schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3066—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
    • H04L9/3073—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves involving pairings, e.g. identity based encryption [IBE], bilinear mappings or bilinear pairings, e.g. Weil or Tate pairing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/04—Masking or blinding

Abstract

A method and system for encrypting a first piece of information M to be sent by a sender (100) to a receiver (110) allows both sender and receiver to compute a secret message key using identity-based information and a bilinear map. In a one embodiment, the sender (100) computes an identity-based encryption key from an identifier ID associated with the receiver (110). The identifier ID may include various types of information such as the receiver's e-mail address, a receiver credential, a message identifier, or a date. The sender uses a bilinear map and the encryption key to compute a secret message key grID, which is then used to encrypt a message M, producing ciphertext V to be sent from the sender (100) to the receiver (110) together with an element rP. An identity-based decryption key dID is computed by a private key generator (120) based on the ID associated with the receiver and a secret master key s. After obtaining the private decryption key from the key generator (120), the receiver (110) uses it together with the element rP and the bilinear map to compute the secret message key grID, which is then used to decrypt V and recover the original message M. According to one embodiment, the bilinear map is based on a Weil pairing or a Tate pairing defined on a subgroup of an elliptic curve. Also described are several applications of the techniques, including key revocation, credential management, and return receipt notification.
PCT/US2002/027155 2001-08-13 2002-08-13 Systems and methods for identity-based encryption and related cryptographic techniques WO2003017559A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT02794941T ATE465571T1 (en) 2001-08-13 2002-08-13 SYSTEMS AND METHODS FOR IDENTITY-BASED ENCRYPTION AND RELATED CRYPTOGRAPHIC TECHNIQUES
AU2002332671A AU2002332671A1 (en) 2001-08-13 2002-08-13 Systems and methods for identity-based encryption and related cryptographic techniques
DE60236094T DE60236094D1 (en) 2001-08-13 2002-08-13 Identity-based encryption systems and methods and related cryptographic techniques
EP02794941A EP1425874B1 (en) 2001-08-13 2002-08-13 Systems and methods for identity-based encryption and related cryptographic techniques
JP2003521528A JP2005500740A (en) 2001-08-13 2002-08-13 ID-based encryption and related cryptosystem systems and methods

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31194601P 2001-08-13 2001-08-13
US60/311,946 2001-08-13

Publications (2)

Publication Number Publication Date
WO2003017559A2 WO2003017559A2 (en) 2003-02-27
WO2003017559A3 true WO2003017559A3 (en) 2003-07-10

Family

ID=23209176

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/027155 WO2003017559A2 (en) 2001-08-13 2002-08-13 Systems and methods for identity-based encryption and related cryptographic techniques

Country Status (7)

Country Link
US (4) US7113594B2 (en)
EP (3) EP2429116B1 (en)
JP (4) JP2005500740A (en)
AT (1) ATE465571T1 (en)
AU (1) AU2002332671A1 (en)
DE (1) DE60236094D1 (en)
WO (1) WO2003017559A2 (en)

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