# Information Bytes

Matthieu Bloch
School of Electrical and Computer Engineering
Georgia Institute of Technology

# Recent works

1. M. Tahmasbi and M. Bloch, “Steganography Protocols for Quantum Channels.” submitted to IEEE International Symposium on Information Theory, Jan. 2019.

@misc{Tahmasbi2019b,
author = {Tahmasbi, Mehrdad and Bloch, Matthieu},
title = {Steganography Protocols for Quantum Channels},
howpublished = {submitted to IEEE International Symposium on Information Theory},
month = jan,
year = {2019}
}


2. M. Tahmasbi and M. R. Bloch, “Covert and secret key expansion over quantum channels under collective attacks.” submitted to IEEE Transactions on Information Theory, Jan. 2019.

We consider an enhanced measure of security for a quantum key distribution protocol, in which we require not only that the adversary obtains no information about the key but also remains unaware that a key generation protocol has been executed. When the adversary applies the same quantum channel independently to each transmitted quantum state, akin to a collective attack in the quantum key distribution literature, we propose a protocol that achieves covert and secret key expansion under mild restrictions. A crucial component of the protocol is a covert estimation stage, which is then combined with universal channel coding for reliability and resolvability in the covert regime.

@misc{Tahmasbi2019a,
author = {Tahmasbi, Mehrdad and Bloch, Matthieu R},
title = {Covert and secret key expansion over quantum channels under collective attacks},
howpublished = {submitted to \emph{IEEE Transactions on Information Theory}},
month = jan,
year = {2019}
}


3. Q. Zhang, M. Bloch, M. Bakshi, and S. Jaggi, “Undetectable Radios: Covert Communication under Spectral Mask Constraints.” submitted to IEEE International Symposium on Information Theory, Jan. 2019.

@misc{Zhang2019,
author = {Zhang, Qiaosheng and Bloch, Matthieu and Bakshi, Mayank and Jaggi, Sidharth},
howpublished = {submitted to IEEE International Symposium on Information Theory},
month = jan,
year = {2019}
}


4. M. Tahmasbi, M. Bloch, and A. Yener, “In-Band Sensing of the Adversary’s Channel for Secure Communication in Wireless Channels.” submitted to IEEE International Symposium on Information Theory, Jan. 2019.

@misc{Tahmasbi2019c,
author = {Tahmasbi, Mehrdad and Bloch, Matthieu and Yener, Aylin},
title = {In-Band Sensing of the Adversary's Channel for Secure Communication in Wireless Channels},
howpublished = {submitted to IEEE International Symposium on Information Theory},
month = jan,
year = {2019}
}