Information Security Applications of Bit-Mixers

A Bit-Mixer is a function of fixed size input and output, which computes uncorrelated output from correlated input values, and its behavior is altered by parameters, called keys. Several bit-mixer constructions have been published with very fast, power efficient implementations in electronic hardware, having very little side channel leakage. In this paper a dozen cryptographic applications are discussed, in most of which the output of the employed bit-mixers are hidden from an adversary. In these cases bit-mixers don’t have to satisfy strict cryptographic requirements, but the security of the applications is improved by reducing exploitable correlations among intermediate values, and by diminishing side channel leakage of electronic implementation

Hardware Bit-Mixers

A new concept, the Bit-Mixer is introduced. It is a function of fixed, possibly different size of input and output, which computes statistically uncorrelated output from correlated input values, and its behavior is altered by parameters, called keys. Several constructions are presented, with very fast, power efficient implementations in electronic hardware, having very little side channel leakage. In information security bit-mixers have many applications, mostly when their output is hidden from an adversary. They include key generators, parallel stream ciphers, hash functions, data dependent authentication codes, and many mor

Near-field direct antenna modulation

NFDAM systems provide a unique solution for transmitting highly secured direction-dependent data and hence preventing eavesdroppers from properly demodulating the signal. A 60-GHz proof-of-concept chip was designed and measured

The Future of High Frequency Circuit Design

The cut-off wavelengths of integrated silicon transistors have exceeded the die sizes of the chips being fabricated with them. Combined with the ability to integrate billions of transistors on the same die, this size-wavelength cross-over has produced a unique opportunity for a completely new class of holistic circuit design combining electromagnetics, device physics, circuits, and communication system theory in one place. In this paper, we discuss some of these opportunities and their associated challenges in greater detail and provide a few of examples of how they can be used in practice

Sending multiple RTP streams in a single RTP session

This memo expands and clarifies the behavior of Real-time Transport Protocol (RTP) endpoints that use multiple synchronization sources (SSRCs). This occurs, for example, when an endpoint sends multiple RTP streams in a single RTP session. This memo updates RFC 3550 with regard to handling multiple SSRCs per endpoint in RTP sessions, with a particular focus on RTP Control Protocol (RTCP) behavior. It also updates RFC 4585 to change and clarify the calculation of the timeout of SSRCs and the inclusion of feedback messages