Ciphertext-Policy Attribute-Based Encryption and Re-Encryption

Muhammad Asim (Inventor), L. Ibraimi (Inventor), M. Petkovic (Inventor)

Research output: Patent

19 Downloads (Pure)

Abstract

A ciphertext-policy attribute-based encryption system, comprising a re-encrypter (9) for cryptographically transforming a first ciphertext (CTp1) associated with a first access policy (P1) into a second ciphertext (CTP2) associated with a second access policy (P2) by means of a re-encryption key (RK). The system further comprises a re-encryption key generator (7) for generating the re-encryption key (RK), wherein the re-encryption key (RK) enables the re-encrypter (9) to cryptographically transform the first ciphertext (CTP1) associated with the first access policy (P1) into the second ciphertext (CTP2) associated with the second access policy (P2). Said re-encryption key generator (7) comprises a subsystem for encrypting a value derived from a pseudorandom number, thereby generating a further ciphertext associated with the second access policy (P2).
Original languageUndefined
Patent numberWO2010IB54581
Priority date11/10/10
Publication statusSubmitted - 11 Oct 2010

Keywords

  • EWI-20947
  • Encryption
  • METIS-281623
  • IR-78966
  • Attribute
  • Ciphertext

Cite this

Asim, M., Ibraimi, L., & Petkovic, M. (2010). Ciphertext-Policy Attribute-Based Encryption and Re-Encryption. Manuscript submitted for publication. (Patent No. WO2010IB54581).
Asim, Muhammad (Inventor) ; Ibraimi, L. (Inventor) ; Petkovic, M. (Inventor). / Ciphertext-Policy Attribute-Based Encryption and Re-Encryption. Patent No.: WO2010IB54581.
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abstract = "A ciphertext-policy attribute-based encryption system, comprising a re-encrypter (9) for cryptographically transforming a first ciphertext (CTp1) associated with a first access policy (P1) into a second ciphertext (CTP2) associated with a second access policy (P2) by means of a re-encryption key (RK). The system further comprises a re-encryption key generator (7) for generating the re-encryption key (RK), wherein the re-encryption key (RK) enables the re-encrypter (9) to cryptographically transform the first ciphertext (CTP1) associated with the first access policy (P1) into the second ciphertext (CTP2) associated with the second access policy (P2). Said re-encryption key generator (7) comprises a subsystem for encrypting a value derived from a pseudorandom number, thereby generating a further ciphertext associated with the second access policy (P2).",
keywords = "EWI-20947, Encryption, METIS-281623, IR-78966, Attribute, Ciphertext",
author = "Muhammad Asim and L. Ibraimi and M. Petkovic",
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year = "2010",
month = "10",
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Asim, M, Ibraimi, L & Petkovic, M 2010, Ciphertext-Policy Attribute-Based Encryption and Re-Encryption, Patent No. WO2010IB54581.

Ciphertext-Policy Attribute-Based Encryption and Re-Encryption. / Asim, Muhammad (Inventor); Ibraimi, L. (Inventor); Petkovic, M. (Inventor).

Patent No.: WO2010IB54581.

Research output: Patent

TY - PAT

T1 - Ciphertext-Policy Attribute-Based Encryption and Re-Encryption

AU - Asim, Muhammad

AU - Ibraimi, L.

AU - Petkovic, M.

N1 - eemcs-eprint-20947

PY - 2010/10/11

Y1 - 2010/10/11

N2 - A ciphertext-policy attribute-based encryption system, comprising a re-encrypter (9) for cryptographically transforming a first ciphertext (CTp1) associated with a first access policy (P1) into a second ciphertext (CTP2) associated with a second access policy (P2) by means of a re-encryption key (RK). The system further comprises a re-encryption key generator (7) for generating the re-encryption key (RK), wherein the re-encryption key (RK) enables the re-encrypter (9) to cryptographically transform the first ciphertext (CTP1) associated with the first access policy (P1) into the second ciphertext (CTP2) associated with the second access policy (P2). Said re-encryption key generator (7) comprises a subsystem for encrypting a value derived from a pseudorandom number, thereby generating a further ciphertext associated with the second access policy (P2).

AB - A ciphertext-policy attribute-based encryption system, comprising a re-encrypter (9) for cryptographically transforming a first ciphertext (CTp1) associated with a first access policy (P1) into a second ciphertext (CTP2) associated with a second access policy (P2) by means of a re-encryption key (RK). The system further comprises a re-encryption key generator (7) for generating the re-encryption key (RK), wherein the re-encryption key (RK) enables the re-encrypter (9) to cryptographically transform the first ciphertext (CTP1) associated with the first access policy (P1) into the second ciphertext (CTP2) associated with the second access policy (P2). Said re-encryption key generator (7) comprises a subsystem for encrypting a value derived from a pseudorandom number, thereby generating a further ciphertext associated with the second access policy (P2).

KW - EWI-20947

KW - Encryption

KW - METIS-281623

KW - IR-78966

KW - Attribute

KW - Ciphertext

M3 - Patent

M1 - WO2010IB54581

ER -

Asim M, Ibraimi L, Petkovic M, inventors. Ciphertext-Policy Attribute-Based Encryption and Re-Encryption. WO2010IB54581. 2010 Oct 11.