Efficient generic on-line/off-line (threshold) signatures without key exposure
نویسندگان
چکیده
Article history: Received 18 December 2007 Received in revised form 28 April 2008 Accepted 24 June 2008
منابع مشابه
Divisible On-Line/Off-Line Signatures
On-line/Off-line signatures are used in a particular scenario where the signer must respond quickly once the message to be signed is presented. The idea is to split the signing procedure into two phases: the off-line and on-line phases. The signer can do some pre-computations in off-line phase before he sees the message to be signed. In most of these schemes, when signing a message m, a partial...
متن کاملOn-line/Off-line Threshold Signatures Without Trusted Dealers
We propose on-line/off-line threshold signature schemes, in which the bulk of signature computation can take place “off-line” during lulls in service requests [7]. Such precomputation can help systems using threshold signatures quickly respond to requests. For example, tests of the Pond distributed file system showed that computation of a threshold RSA signature consumes roughly 86% of the time...
متن کاملGeneric Construction of Chameleon Hash to Group Elements
—Chameleon hash functions are trapdoor one-way functions with many applications such as chameleon signatures and on-line/off-line signatures. Previous research focused on the concrete constructions based on different assumptions, as well as schemes without the key-exposure problem. In this paper, we consider the structure-preserving schemes where messages, hash value and public keys all consis...
متن کاملImproved On-Line/Off-Line Threshold Signatures
At PKC 2006 Crutchfield, Molnar, Turner and Wagner proposed a generic threshold version of on-line/off-line signature schemes based on the “hash-sign-switch” paradigm introduced by Shamir and Tauman. Such a paradigm strongly relies on chameleon hash functions which are collision-resistant functions, with a secret trapdoor which actually allows to find arbitrary collisions efficiently. The “hash...
متن کاملAn Efficient Off-Line Reputation Scheme Using Articulated Certificates
A common feature practical reputation schemes is that they are on-line which results in restrictions to both availability and scalability. In order to overcome these two problems we propose an off-line reputation scheme based on public key certificates. We introduce the idea of articulated certificates which use proxy signatures to increase the efficiency of reputation verification. As well as ...
متن کاملذخیره 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 ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Inf. Sci.
دوره 178 شماره
صفحات -
تاریخ انتشار 2008