In this work we present the first passive attack over the SASI lightweight authentication protocol with modular rotations. This can be used to fully recover the secret ID of the RFID tag, which is the value the protocol is designed to conceal. The attack is described initially for recovering blog2(96)c = 6 bits of the secret value ID, a result that by itself allows to mount traceability attacks...

We illustrate a vulnerability introduced to elliptic curve cryptographic protocols when implemented using a function of the OpenSSL cryptographic library. For the given implementation using an elliptic curve E over a binary field with a point G ∈ E, our attack recovers the majority of the bits of a scalar k when kG is computed using the OpenSSL implementation of the Montgomery ladder. For the E...

Side-channel analysis is a well-known and efficient hardware technique to recover embedded secrets in microprocessors. Countermeasures relying on random masking have been proven to be sound protections against such threats and are usually added to protect sensitive intermediate data during the algorithm process. However, SecondOrder Side-Channel Analysis have proven to allow secret key recovery...

A safe, effective and expandable RFID authentication protocol with cloud database as server (CRFID) is proposed in order to ensure the security of RFID network. Firstly, the tree structure management tag is used to realize privacy protection and meanwhile the time complexity of the cloud database searched by RFID system is reduced from O(N) to O(logN); then, the size of each sub-item in the sec...

Side Channel Attacks exploit information that leaks from a cryptographic device. Power Analysis is a kind of side channel attack which reveals the key of cryptographic device by analyzing its power consumption. Power analysis attack causes serious threat to the security of cryptographic devices. Differential Power Analysis Attack is most widely used against embedded devices but suffers from few...

Secret sharing schemes are very important techniques for the key management. To provide more efficient and flexible alternatives for the applications of secret sharing, this paper presents a dynamic multi-secret sharing scheme. A significant characteristic of the proposed scheme is that each participant has to keep only one master secret share which can be used to reconstruct different group se...

Security is the major area of concern in communication channel. Security is very crucial in wireless sensor networks which are deployed in remote environments. Adversary can disrupt the communication within multi hop sensor networks by launching the attack. The common attacks which disrupt the communication of nodes are packet dropping, packet modification, packet fake routing, badmouthing atta...

A simple secret sharing scheme for secure visual communications is presented in this paper. Secret sharing schemes allow a group of participants at different locations to share a secret (i.e., an image) among them by splitting it into n pieces (“shares” or “shadows”). In case of the (k, n) secret sharing scheme only a group of k qualified participants among n (where k ≤ n) can reconstruct the s...