Intercepting mobile communications: the insecurity of 802.11
Proceedings of the 7th annual international conference on Mobile computing and networking
Substitution Deciphering Based on HMMs with Applications to Compressed Document Processing
IEEE Transactions on Pattern Analysis and Machine Intelligence
Cryptanalysis of Microsoft's PPTP Authentication Extensions (MS-CHAPv2)
Proceedings of the International Exhibition and Congress on Secure Networking - CQRE (Secure) '99
An empirical study of smoothing techniques for language modeling
ACL '96 Proceedings of the 34th annual meeting on Association for Computational Linguistics
Attacking and repairing the winZip encryption scheme
Proceedings of the 11th ACM conference on Computer and communications security
Fast dictionary attacks on passwords using time-space tradeoff
Proceedings of the 12th ACM conference on Computer and communications security
Keyboard acoustic emanations revisited
Proceedings of the 12th ACM conference on Computer and communications security
A natural language approach to automated cryptanalysis of two-time pads
Proceedings of the 13th ACM conference on Computer and communications security
Information Security Management Handbook, Volume 1
Information Security Management Handbook, Volume 1
Timing analysis of keystrokes and timing attacks on SSH
SSYM'01 Proceedings of the 10th conference on USENIX Security Symposium - Volume 10
The application of hidden Markov models in speech recognition
Foundations and Trends in Signal Processing
Attacks on the RC4 stream cipher
Designs, Codes and Cryptography
When cryptography meets storage
Proceedings of the 4th ACM international workshop on Storage security and survivability
Practical attacks against WEP and WPA
Proceedings of the second ACM conference on Wireless network security
SWITCHBOARD: telephone speech corpus for research and development
ICASSP'92 Proceedings of the 1992 IEEE international conference on Acoustics, speech and signal processing - Volume 1
Speaker recognition from encrypted VoIP communications
Digital Investigation: The International Journal of Digital Forensics & Incident Response
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Keystream reuse, also known as the two time pad problem, is a well known weakness in stream ciphers. The implementers of the cryptographic algorithms are still underestimating this threat. The keystream reuse exploitation techniques presented so far assume the underlying plaintext to be textual data and all the heuristics presented previously are based on the language characteristics of the underlying text based data, which fail when compression is applied on the plaintext before encryption. This paper presents exploitation techniques for two time pads in case of stream ciphered digitized and compressed speech signals. In this paper we show that how an adversary can automatically recover the digitized speech signals encrypted under the same keystream provided the language (e.g. English) and digital encoding/compression scheme details of the underlying speech signals are known. Our technique of cryptanalysis is based on the modeling of the speech parameters by exploiting the inter frame correlations between each components of the speech vectors in different frames and then using these models to decode the two speech signals in the keystream reuse scenario. The technique is flexible enough to incorporate all modern speech coding schemes based on parameter or hybrid encoding and compression techniques. The simulation experiments have showed promising results for most of the present day speech digitization and compression techniques.