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Attacking the tav-128 hash function
| Content Provider | Indraprastha Institute of Information Technology, Delhi |
|---|---|
| Author | Kumar, Ashish Sanadhya, Somitra |
| Abstract | Many RFID protocols use cryptographic hash functions for their security. The resource constrained nature of RFID systems forces the use of light weight cryptographic algorithms. Tav-128 is one such light weight hash function proposed by Peris-Lopez et al. for an RFID authentication protocol. In this article we show that Tav-128 is not collision resistant. We show a practical collision attack against Tav-128 and produce message pairs of arbitrary length which produce the same hash value under this hash function. We also study the constituent functions of Tav-128 and show that the concatenation of nonlinear functions A and B produces a 64-bit permutation from 32-bit messages. This could be a useful light weight primitive for future RFID protocols. |
| File Format | |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Hash function Tav-128 Cryptanalysis |
| Content Type | Text |
| Resource Type | Technical Report |
| Subject | Data processing & computer science |
