Network LayerSecurity. Design forA Cross Layer Architecture

it, roseti@,ing. uniroma2. it Abstract- Traditional modular layering schemes haveserved a However, duetoitsstringent error check, evensingle biterror major part inthedevelopment ofavariety ofprotocols. However,mayleadtopacket loss.A transport protocol called UDP- asthephysical layer impairments become moreunpredictable, a Lite, thatusespartial checksum, wastherefore designed to cross layer design (CLD)whichisdynamic innature providesalleviate thisinherent problem ofUDP.UDP-Lite inspects better performance. CLD introduces newchallenges inprotocolerror ononly part ofthepacket identified assensitive toerrors design aswell asintheareaofsecurity, bythechecksum coverage field, andignores errors inthe Using numerical analysis, weshowthatalinklayer designremaining parts ofthepacket. However totakeadvantage of employing headercompression andcrosslayer signalling to UDP-Lite, modifications arerequired atthelowerlayers to protect protocol headers canlimit packet discarding. Thispaper allow corrupted packets tobedelivered tothehigher layers. also reviews theIPsec protocol anddescribes howIPsec canbe Security isparamount intoday's Internet. A security modified forcross layer architecture. ~~~~~Coverage field.