Breaking Existential Unforgeability of a Signature Scheme from Asiacrypt 2014

نویسنده

  • Georg Fuchsbauer
چکیده

We show how to compute an existential forgery after querying 4 signatures on chosen messages for a signature scheme presented at Asiacrypt 2014.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Efficient Strongly Unforgeable ID-Based Signature Without Random Oracles

Abstract.Up to date, a large number of ID-based signature (IBS) schemes based on bilinear pairings have been proposed. Most of these IBS schemes possess existential unforgeability under adaptive chosen-message attacks, among which some offer strong unforgeability. An IBS scheme is said to be strongly unforgeable if it possesses existential unforgeability and an adversary who is given signatures...

متن کامل

Cryptanalysis of the Structure-Preserving Signature Scheme on Equivalence Classes from Asiacrypt 2014

At Asiacrypt 2014, Hanser and Slamanig presented a new cryptographic primitive called structure-preserving signature scheme on equivalence classes in the message space (G1), where G1 is some additive cyclic group. Based on the signature scheme, they constructed an efficient multi-show attribute-based anonymous credential system that allows to encode an arbitrary number of attributes. The signat...

متن کامل

Security Proofs for the BLT Signature Scheme

We present security proofs for the BLT signature scheme in the model, where hash functions are built from ideal components (random oracles, ideal ciphers, etc.). We show that certain strengthening of the Pre-image Awareness (PrA) conditions like boundedness of the extractor, and certain natural properties (balancedness and the so-called output one-wayness) of the hash function are sufficient fo...

متن کامل

Adapting Lyubashevsky's Signature Schemes to the Ring Signature Setting

Basing signature schemes on strong lattice problems has been a long standing open issue. Today, two families of lattice-based signature schemes are known: the ones based on the hash-andsign construction of Gentry et al.; and Lyubashevsky’s schemes, which are based on the Fiat-Shamir framework. In this paper we show for the first time how to adapt the schemes of Lyubashevsky to the ring signatur...

متن کامل

Certificateless Signature with Strong Unforgeability in the Standard Model

Abstract. Certificateless public-key systems (CL-PKS) were introduced to simultaneously solve two critical problems in public-key systems. One is the key escrow problem in ID-based public-key systems and the other is to eliminate the presence of certificates in conventional public-key systems. In the last decade, several certificateless signature (CLS) schemes have been proposed in the random o...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • IACR Cryptology ePrint Archive

دوره 2014  شماره 

صفحات  -

تاریخ انتشار 2014