3 edition of Blind certification of public keys and off-line electronic cash found in the catalog.
Blind certification of public keys and off-line electronic cash
by Hewlett-Packard Laboratories, Technical Publications Department in Palo Alto, CA
Written in English
|Series||HP Laboratories technical report -- HPL-96-71.|
|The Physical Object|
|Pagination||14 p. ;|
|Number of Pages||14|
Identity-based cryptosystem has a property that a user's public key can be easily calculated from his identity by a publicly available function, and can be hence a good alternative for certificate-based public key infrastructure. Blind signature has the anonymity and plays a central role in applications such as electronic voting and electronic cash systems. An off-line electronic cash system having an electronic coin, a bank B, a payee S, and a user U with an account at the bank B as well as a user password z u,i, has a method for performing an electronic cash transfer. An electronic coin is withdrawn from the bank B by the user U and an electronic record of the electronic coin is stored by the bank B.
The RSA blind signatures achieved unlinkability between withdrawal and spend transactions. Depending on the payment transactions, one distinguishes between on-line and off-line electronic cash: If the payee has to contact a third party (e.g., the bank or the credit-card company acting as an acquirer) before accepting a payment, the system is. Numerous anonymous off-line e-cash systems have been proposed in the literature. The technique of blind signature is always used to achieve anonymity. Today many various blind signatures have been proposed which based on Schnorr signature, RSA, or Nyberg-Rueppel signature (Boyd et al. ; Chaum ; Mu et al. ).
Before withdrawing e-cash from a bank, customer C needs to ask trustee T to issue him a license. The following steps describe the protocol, which is also illustrated in Fig. Step 1: C chooses a random number, k ∈ Z q ∗, and blind factor, b ∈ Z q ∗, and uses his private key, S C, and T’s public key, Q T, to compute the session key, K CT, as H 2 (e(S C, kQ T)). Research on transferable off-line electronic cash system Research on transferable off-line electronic cash system Liu, Yichun In this paper, a new cash scheme is proposed for electronic payment system, in which the cash can be transferred several times. When this kind of cash is used, the fraud such as double spending can be found out but the bank and the .
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Another consequence of the application of the secret-key certificate technique is that the withdrawal protocol is not a blind signature issuing protocol. This falsifies the popular belief that efficient privacy-protecting off-line electronic cash systems must be based on withdrawal protocols that are blind signature issuing by: Blind Certification of Public Keys and Off-LineElectronic Cash Wenbo Mao Hewlett-P~ckard Laboratories Filton Road Bristol BS12 6QZ United Kingdom wm~ May 1, Abstract We present a method for blindcertifying end-users'public keys and its application in off line electronic cash.
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda). An off-line electronic coin system is presented that offers multi-party security and unconditional privacy of payments. The system improves significantly on the efficiency of the previously most efficient such system known in the literature, due to application of a recently proposed technique called secret-key.
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): An off-line electronic coin system is presented that offers multi-party security and unconditional privacy of payments. The system improves significantly on the efficiency of the previously most efficient such system known in the literature, due to application of a recently proposed technique called secret-key.
secret-key certificate off-line electronic cash standard intractability assumption withdrawal protocol restrictive blind efficient system off-line electronic coin system multi-party security indistinguishable probability distribution unconditional privacy account holder public key well-known signature scheme polynomial-time reduction cash.
In this paper, we present a simpler and provably secure ID-based restrictive partially blind signature (RPBS), and then propose an ID-based fair off-line electronic cash (ID-FOLC) scheme with. In this paper, we propose an untraceable off-line blind-signature-based electronic cash scheme.
Our proposed scheme attaches expiration date to each coin so that old coins can be exchanged for new ones by using a protocol called the exchange protocol (see Varadharajan et al.,Wang et al.,Fan, for examples of schemes without.
W () Blind certification of public keys and off-line electronic cash. Hawlett-Packard Laboratories, Palo Alto Menezes AJ, van Oorschot P C, Vanstone SA () Handbook of.
have designed efficient session key exchange and blind signature schemes for the blinded e-cash based payment systems using the self-certified public key cryptosystems based on ECC. In summary, the proposed efficient self-certified public key cryptosystems make the on-line electronic cash payment system securely workable for Internet consumers.
2 Blind Certification ofPublic keys Similar to an ordinary certificate for an end-user'spublic key, a blind certificate is a digital signature created by an CA to combine a public key and its holder'sidentity.
Nevertheless, the identity of a blind certificate's holder is concealed. Using Chaum's blind. The main controversial issue in off-line electronic cash systems is simultaneously fulfilling untraceability and double spending detection.
After the Chaum scheme which used a blind signature to achieve untraceability, numerous untraceable electronic cash schemes have been proposed based on this structure.
In blind signature-based. We propose a micro-cash technique based on a one-time signature scheme: signing a message more than once leads to disclosure of the signer's private key.
In addition to usual cash properties such as off-line bank for payment and spender's anonymity, the technique also provides a number of useful features.
To enable the practical electronic cash systems, significant attention has been paid to the partially blind signature because of its unlinkability and unforgeability.
To the best of our knowledge, most of partially blind signature schemes are constructed under either the traditional public key certificate based system or the ID-based system, which may incur significant efforts in certification. ID-based public key cryptography (ID-PKC) has many advantages over certificate-based public key cryptography (CA-PKC), and has drawn researchers’ extensive attention in recent years.
However, the existing electronic cash schemes are constructed under CA-PKC, and there seems no electronic cash scheme under ID-PKC up to now to the best of our knowledge. Abstract. An off-line electronic coin system is presented that offers multi-party security and unconditional privacy of payments.
The system improves significantly on the efficiency of the previously most efficient such system known in the literature, due to application of a recently proposed technique called secret-key certificates.
A restrictive blind signature issuing protocol enables an issuer to issue a triple, consisting of a secret key, a matching public key, and a certificate of the issuer on the public key, in such a way that (1) the public key and the certificate can be blinded by the receiver.
For instance, several shortcomings can be found in a simple e-cash system in which a bank issues blind signatures as electronic cash. In this kind of system, the bank has to use different private and public key pairs for different face values of e-cash, since the bank cannot set the value on any blindly-issued e-cash.
Abstract. A digital-cash system normally consists of clients, vendors, and a bank. Any legitimate client can obtain a valid digital coin 1 from a bank and anonymously send the coin to a vendor.
The vendor later deposits the coin to the bank. We propose a generic framework for the development of an off-line peer-to-peer electronic payment system with fixed-value electronic coins.
The proposed scheme simulates the issuance, circulation and characteristics of conventional cash and satisfies important security, privacy and usability requirements, offering a comparative advantage over other existing solutions.
 Mao W.: Blind Certification of Public Keys and Off-line Electronic Cash. Hawlett-Packard Laboratories,  Schneier B.: Kryptografia dla praktyków.
Protokoły, algorytmy i programy źródłowe w języku C. WNT. The authenticity of public keys in an asymmetric cryptosystem can be gained in two different ways: either it is verified explicitly after knowing the public key and its certificate, e.g.
XSecure and efficient electronic payment systems are sig-nificant for electronic commerce. Fangguo  proposed a fair elec-tronic cash system with multiple banks based on a group signature scheme.Application of the new issuing protocols results in the most efficient and versatile off-line electronic cash systems known to date, without using the blind signature technique developed by Chaum.