We analyze the feasibility of boostrapping a location service through geocoded postal addresses rather than the common wardriving technique. A location service that contains the MAC addresses and geographic position of wireless LAN access points enables positioning services for WLAN devices and location-aware networking protocols. This work thus compares the accuracy of access point position es...

We apply cryptographic techniques to the problem of fraud in metered mail. We describe a mail system that combines off-the-shelf barcode technology, tamper-proof devices, and cryptography in a fully-integrated secure franking system. This system provides protection against: 1. Tampering with postage meters to fraudulently obtain extra postage; 2. Forging and copying of stamps; 3. Unauthorized u...

PATRIK BARCELOS-SILVA, LEANDRO LOURENÇO DUMAS & ANA MARIA PES 1Instituto Nacional de Pesquisas da Amazônia (INPA), Coordenação de Pesquisas em Biodiversidade (Campus II), Av. André Araujo, 2936, B. Petrópolis, Caixa Postal 2223, 69.080-971, Manaus, AM, Brazil 2Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Caixa Postal 68044, Cidade Universitária, 21941...

Departamento de Biologı́a Molecular de Plantas, Instituto de Biotecnologı́a, Universidad Nacional Autónoma de México, Apartado Postal 510–3, Cuernavaca Morelos 62271, México (L.C., F.S., C.Q.); Biology Department, Morrill Science Center, University of Massachusetts, Box 35810, Amherst, Massachusetts 01003–5810 (T.L.H.-C., J.G.K., P.K.H.); Instituto Gulbenkian de Ciência, P–2780–156 Oeiras, Portug...

The events of October 2010, where terrorists managed to get explosive devices onboard of three passenger aircrafts and two air freighters, demonstrated weaknesses of the international air cargo and airmail security. Ever since, postal security has gained interest among policymakers and authorities. This study augments the limited body of academic literature on the topic by demarcating areas of ...