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De elopmen o a Secu i y Au hen ica ion O ice Cabine Sys em wi h E ec i e
Wi eless Communica ion P o ocols
Nsikak John A ia
Depa men Elec ical /Elec onic Enginee ing Technology, Akwa Ibom S a e Poly echnic,
Iko Osu ua, Akwa Ibom S a e. PMB 1200
ARTICLE
INFO
ABSTRACT
Pape ID: IJASTR-
68E03E6485C2F
Recei ed: 2025-09-02
Published: 2025-10-05
DOI:
h ps://dx.doi.o g/
10.5281/zenodo.1733
0502
Page No: 177-191
In oday’s digi al-d i en wo k en i onmen s, secu ing sensi i e documen s is one o he
c i ical equi emen s ha goes beyond he adi ional lock-and-key solu ions. This s udy
p esen s he design and implemen a ion o a Secu i y Au hen ica ion O ice Cabine
Sys em wi h E ec i e Wi eless Communica ion P o ocols, de eloped o add ess he
g owing h ea s o unau ho ized access and da a b eaches in o ganiza ional en i onmen s
especially go e nmen own es ablishmen . The sys em in eg a es a solenoid-based
elec omagne ic lock, mic ocon olle (ATMEGA328PU), wi eless modules (ESP8266
Wi-Fi, SIM900 GSM), and a mobile applica ion o eal- ime moni o ing and ale s. To
alida e i s design, ex ensi e es s we e ca ied ou , ocusing on au hen ica ion eliabili y,
sys em esponse, ala m e iciency, wi eless ange, and powe pe o mance. Resul s
ob ained om he s udy demons a ed 100% ejec ion o unau ho ized codes du ing ini ial
access a emp s and a 99% success a e in g an ing access o co ec passwo ds, con i ming
s ong au hen ica ion accu acy. The sys em achie ed an a e age esponse ime o unde 2
seconds, ensu ing swi au ho iza ion, while alse ala ms we e limi ed o jus 1.2%,
highligh ing i s obus ness in eal-wo ld scena ios. The ba e y analysis e ealed he low
ene gy consump ion, wi h he uni ope a ing a jus 0.5W in s andby mode and deli e ing
eliable pe o mance o e ex ended use. The wi eless es ing showed a consis en success
a e wi hin a 30–50m ange, ensu ing dependable communica ion o ale s and
no i ica ions. Cos analysis o e a 5-yea pe iod e ealed ha al hough up on in es men
is domina ed by app de elopmen , he sys em deli e s long- e m alue, a e aging 20–30%
cos sa ings compa ed o con en ional wi ed sys ems, while o e ing scalabili y o mul i-
o ice deploymen s. The combina ion o s ong physical secu i y wi h ad anced digi al
au hen ica ion and wi eless connec i i y, p esen s a sys em ha deli e s a secu e, ene gy-
e icien , and use - iendly solu ion ha can aligns wi h mode n o ice needs. I s success ul
alida ion demons a es no only i s echnical eliabili y bu also i s po en ial o ans o m
o ice secu i y p ac ices, educe isks o documen he , and imp o e ope a ional esilience
in bo h small businesses and la ge en e p ises.
Keywo ds: Secu i y Au hen ica ion, O ice Cabine , Wi eless Communica ion, Access
Con ol
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ISSN 2249-9954
Ci e This Pape : Nsikak John A ia (2025). " De elopmen o a Secu i y
Au hen ica ion O ice Cabine Sys em wi h E ec i e Wi eless Communica ion
P o ocols ". INTERNATIONAL JOURNAL OF ADVANCED SCIENTIFIC AND
TECHNICAL RESEARCH (IJASTR), ol. 15, no. 5, 2025, pp. 177-191. DOI:
h ps://dx.doi.o g/10.5281/zenodo.17330502
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1. In oduc ion
In an e a o apidly ad ancing echnology and inc easing conce ns abou da a secu i y, he
de elopmen o sophis ica ed secu i y sys ems o o ice en i onmen s has become pa amoun .
The secu i y au hen ica ion o ice cabine sys em wi h e ec i e wi eless communica ion
p o ocols ep esen s a cu ing-edge solu ion o he pe asi e challenge o p o ec ing sensi i e
documen s and asse s wi hin o ganiza ional se ings (Nag e al., 2024; Oladinni &
Odumuwagun, 2025; Odumuwagun,2025; Rahimi e al.,2025). This inno a i e sys em
in eg a es ad anced au hen ica ion mechanisms wi h s a e-o - he-a wi eless communica ion
echnologies o c ea e a obus , use - iendly, and highly secu e me hod o sa egua ding
con iden ial in o ma ion (Saxena & Choi, 2015). The need o such a sys em a ises om he
g owing h ea s o da a secu i y in mode n o ices. T adi ional lock-and-key cabine s a e no
longe su icien o p o ec agains sophis ica ed b eaches, inside h ea s, and he po en ial o
human e o (Tobias, 2024). Mo eo e , he shi owa ds digi al ans o ma ion in wo kplace
ope a ions demands a secu i y solu ion ha can seamlessly in eg a e wi h exis ing IT
in as uc u e while p o iding enhanced p o ec ion o physical documen s and asse s Saeed e
al., 2023). These au hen ica ion laye s wo k in conce o ensu e ha only au ho ized pe sonnel
can access sensi i e ma e ials, signi ican ly educing he isk o unau ho ized en y and da a
he . The sys em's wi eless communica ion p o ocols play a c ucial ole in i s e ec i eness.
By le e aging echnologies such as Blue oo h Low Ene gy (BLE), Wi-Fi, o o he secu e
wi eless s anda ds, he sys em enables eal- ime moni o ing, emo e access con ol, and ins an
ale mechanisms. This wi eless connec i i y no only enhances he sys em's secu i y ea u es
bu also acili a es seamless in eg a ion wi h exis ing o ice ne wo ks and secu i y
in as uc u es (G anjal e al (2015).
Pas esea ches conduc ed on his ield ha e also add ess eme ging challenges and de elopmen
o obus secu i y au hen ica ion o ice cabine sys em wi h e ec i e wi eless communica ion
p o ocols, o mee he e ol ing secu i y o ice equi emen s. Fo example, Vai hiyana han e
al. (2024) p esen ed a de ailed design and implemen a ion o a wi eless an i- he ala m sys em
ha inco po a es mobile phones as a cen al componen . The au ho s discussed he sys em
a chi ec u e, ha dwa e design, and so wa e de elopmen , highligh ing he e ec i eness and
p ac icali y o he p oposed solu ion.
Naga aja e al. (2009) p oposed a GSM-based wi eless an i- he sys em speci ically designed
o ehicles. The s udy ocused on he in eg a ion o mobile phones wi h he sys em o p o ide
eal- ime no i ica ions and con ol ea u es. The pape also discussed he sys em's
implemen a ion, pe o mance e alua ion, and po en ial applica ions. Ça aş & Ahmad (2019)
explo ed he in eg a ion o he wi eless an i- he ala m sys em wi h he In e ne o Things (IoT)
echnology. The au ho s discussed he sys em's a chi ec u e, highligh ing i s abili y o connec
wi h a ious IoT de ices o enhanced secu i y and moni o ing. The pape also p esen ed
expe imen al esul s and discussed he sys em's ad an ages and limi a ions. Agboni o e al.
(2021) ocused on he design and implemen a ion o a wi eless an i- he ala m sys em ha
inco po a es loca ion acking using mobile phones. The au ho s discussed he sys em's
ha dwa e and so wa e componen s, emphasizing he impo ance o accu a e loca ion acking
in p e en ing he and aiding eco e y. The pape also p esen ed expe imen al esul s and
discusses po en ial u u e enhancemen s. Mus acoglu e al. (2020) e alua ed he secu i y
ea u es and ulne abili ies o passwo d-based o ice ile cabine s. The s udy p o ided insigh s
in o he e ec i eness o di e en passwo d enc yp ion algo i hms and highligh s po en ial
weaknesses ha need o be add essed o enhanced secu i y. Sca one & Souppaya (2009).
explo ed he guide o en e p ise passwo d managemen . The au ho s discussed he challenges
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aced du ing he implemen a ion p ocess, such as use accep ance, aining equi emen s, and
in eg a ion wi h exis ing sys ems. Haque e al. (2017) in es iga ed he lea ning sys em-
assigned passwo ds (up o 56 bi s) in a single egis a ion session wi h he me hods o cogni i e
psychology. The au ho s explo ed he impac o passwo d complexi y equi emen s, use
in e ace design, and passwo d ese mechanisms on use sa is ac ion and p oduc i i y. The
indings o e ed aluable insigh s o designing use - iendly ile cabine sys ems. Mohammed
(2024) e iewed he secu i y challenges and conside a ions associa ed wi h he p o ec ion o
cloud se ice p o ide s based on an e icien passwo d-based au hen ica ion sys em. The
po en ial isks o s o ing passwo ds in he cloud was examined and s a egies o mi iga e hese
isks we e p oposed.
The s udy also highligh ed he impo ance o secu e passwo d managemen p ac ices.
Alkhali ah (2024) explo ed he enhancemen o passwo d-based ile cabine secu i y h ough
he implemen a ion o mul i- ac o au hen ica ion (MFA). The bene i s o combining
passwo ds wi h addi ional au hen ica ion ac o s, such as biome ics o sma ca ds we e
discussed. The de elopmen secu i y au hen ica ion o ice cabine sys em akes in o accoun
he need o scalabili y and adap abili y in di e se o ice en i onmen s. I s modula design
allows o easy expansion and cus omiza ion o mee he speci ic secu i y equi emen s o
di e en o ganiza ions, om small businesses o la ge en e p ises. The sys em inco po a es
ene gy-e icien componen s and p o ocols, aligning wi h mode n g een o ice ini ia i es and
educing ope a ional cos s.
One o he key ad an ages o his secu i y au hen ica ion o ice cabine sys em is i s abili y o
c ea e comp ehensi e audi ails. E e y access a emp , success ul o no , is logged and can be
analysed o secu i y audi s, compliance checks, and o ensic in es iga ions i necessa y. This
ea u e no only enhances secu i y bu also aids in egula o y compliance, which is inc easingly
impo an in many indus ies. The de elopmen o his secu i y au hen ica ion o ice cabine
sys em ma ks a signi ican ad ancemen in he ield o o ice secu i y. By combining obus
physical secu i y measu es wi h ad anced digi al au hen ica ion and wi eless communica ion
echnologies, i o e s a comp ehensi e solu ion o he complex secu i y challenges aced by
mode n o ganiza ions. This s udy explo ed he de elopmen , au hen ica ion echnique
employed, wi eless communica ion p o ocols u ilized, and he a ious ea u es ha
di e en ia es he secu i y o ice ca bona e om con en ional o ice secu i y solu ions.
Mo eo e , he po en ial impac s o his echnology on o ice secu i y p ac ices, use beha iou ,
and o ganiza ional da a p o ec ion s a egies.
2. Resea ch Me hodology
The p ocess low diag am o he secu i y au hen ica ion o ice cabine sys em is p esen ed in
Figu e 1. The di ec ion o he a ows illus a es he ope a ion p inciples o he sys em when he
powe swi ch is u ned ON. When he swi ch is u ned on, he powe om he inbuil ba e y
lows o he mic o con olle , LCD sc een and SIMCOM sim900 module. Powe mus low o
his h ee sec ions o enable he SIMCOM sim900 module sea ch o ne wo k immedia ely.
The mic o con olle mus be boo ed o ecei e signal om he passwo d keypad, he LCD
sc een mus be powe ed o i o display when he mic o con olle has comple ed he boo ing
p ocess.
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Figu e 1: P ocess low diag am o he secu i y au hen ica ion o ice cabine sys em
When he e is powe in he mic o con olle (ATMEGA328PU), mic ocon olle loads he
p og ammed in o ma ion which is displayed on he LCD sc een. The LCD sc een displays he
in o ma ion s a us o he SIMCOM sim900 module when i has ound ne wo k. The mic o
con olle being he b ain o he o ice ile cabine a e loading wai s o inpu signal
(passwo d) om he X keypad. When he passwo d is yped, he mic o con olle scans he
inpu ed passwo d o see i i ma ches wi h he p og ammed passwo d in he mic o con olle .
I i ma ches he p og ammed passwo d, he mic o con olle sends an ou pu signal o u n on
he ansis o .
The ansis o ac i a es he elay coils, when he elay coils a e ac i a ed, he con ac e minals
o he elay a e connec ed o he powe supply, he eby, ac i a ing he solenoid lock o he
o ice ile cabine o be unlocked. When a passwo d is being yped, he mic o con olle scans
he yped passwo d o see i i ma ches wi h he p og ammed passwo d. I i does no ma ch he
p og ammed passwo d, he mic o con olle sends an ou pu signal o he SIMCOM sim900
module o au oma ically send a phone call o he owne , no i ying him o he ha he e is an
in ude , while he o ice ile cabine s ill emain locked. Ci cui diag am o he passwo d-base
o ice ile cabine wi h wi eless an i- he ala m sys em using mobile phone is shown in Figu e
2.
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Figu e 2: Ci cui diag am o he secu i y au hen ica ion o ice cabine
Speci ica ions o he secu i y au hen ica ion o ice cabine sys em wi h e ec i e wi eless
communica ion p o ocols a e p esen ed in Table 1. Howe e , ci cui boa d o he sys em
showing wi e connec ion o o he panels is illus a ed in Figu e 3. The cons uc ion o he
sys em in ol ed in eg a ion o a ious elec onic componen s, including senso s,
mic ocon olle s, wi eless modules and echa geable ba e ies. These componen s we e
ca e ully selec ed based on hei eliabili y, compa ibili y, and powe e iciency. The ci cui y
was designed o minimize powe consump ion, ensu ing long ba e y li e and educing he need
o equen echa ging. Figu e 3 shows pic o ial iew o wi e connec ion o he ci cui boa d.
P ocedu e o de eloping he sys em was ca ied ou by ough he ollowing s eps.
i. Acquisi ion o he equi ed componen s
ii. Tes ing he elec onic componen s o be su e hey a e all wo king.
iii. Solde ing all he elec onic componen s o he e o boa d acco ding o he ci cui
diag am.
i . Ensu ing ha an IC socke was compa ible o socke he p og ammable IC (ATMEGA
328PU).
. Inse ing a egis e ed SIM ca d o he SIMCOM SIM900 module.
i. Con i ming all connec ions be o e inpu ing he powe
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Figu e 3: Ci cui boa d o he sys em showing wi e connec ion o o he panels
Table 1: de ailed speci ica ions o he secu i y au hen ica ion o ice cabine sys em
File Cabine Speci ica ions
Elec onic Locking Mechanism
Mic ocon olle
- Dimensions: 52" H x 36"
W x 19" D
- Ma e ial: S eel
- Weigh : 68 Kg
- Numbe o d awe s: 4
- Type: Solenoid-based
elec omagne ic lock
- Ope a ing ol age: 12V DC
- Cu en d aw when ac i e:
300mA
- S andby cu en : 10mA
- Ac i a ion ime: 0.5 seconds pe
lock/unlock cycle
- Type: A duino Nano
- Ope a ing ol age: 5V DC
- Clock speed: 16 MHz
- Ac i e cu en consump ion:
15mA
- Sleep mode cu en
consump ion: 0.6mA
Wi eless Module
Ala m Sys em
Senso s
- Type: ESP8266 Wi-Fi module
- Ope a ing ol age: 3.3V DC
- T ansmi cu en : 170mA
- Recei e cu en : 50mA
- Sleep cu en : 10µA
- Ac i e ime pe day: 5 minu es ( o
pe iodic checks and upda es)
- Si en ype: Piezoelec ic
- Ope a ing ol age: 12V DC
- Cu en d aw when ac i e:
250mA
- S andby cu en : 0mA (only
ac i a ed when ala m is igge ed)
- Type: Magne ic eed swi ches
(one pe d awe )
- Quan i y: 4
- Ope a ing ol age: 5V DC
- Cu en d aw when ac i e:
10mA each
- S andby cu en : 0mA (no mally
open)
Display
Powe Suppl
y
Backup Ba e y
- Type: 16x2 LCD
- Ope a ing ol age: 5V DC
- Cu en consump ion: 25mA
- Type: AC o DC adap e
- Inpu : 100-240V AC, 50/60Hz
- Ou pu : 12V DC, 2A max
- E iciency: 85%
- Type: Li hium-ion echa geable
- Capaci y: 2000mAh
- Vol age: 11.1V (3-cell
con igu a ion)
Mobile Phone App
Usage Scena io
Ene gy Moni o ing Equipmen
- Pla o m: And oid and iOS
- Es ima ed powe consump ion on
mobile de ice: 5% o phone ba e y pe
day
- A e age numbe o lock/unlock
cycles pe day: 30
- Ala m ac i a ion du a ion: 5
minu es pe e en
- Sys em a med ime: 14 hou s
pe day (a e o ice hou s)
- Powe me e accu acy: ±0.5% o
eading
- Sampling a e: 1 sample pe
second
- Moni o ing du a ion: 7 days
S andby Powe Consump ion:
Peak Powe Consump ion
En i onmen al Condi ions
- Es ima ed o al s andby powe : 0.5W - Es ima ed peak powe du ing
ala m ac i a ion: 10W
- Ope a ing empe a u e ange:
10°C o 40°C
- Humidi y ange: 20% o 80%
RH (non
-
condensing)
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All he componen s we e solde ed in o he Ve o Boa d. A e wa ds, a case/housing was
ab ica ed whe e he en i e ci cui was moun ed ollowed by o he ex e nal componen s such
as indica o s, LCD, and swi ch. The i s sec ion o he o ice ile cabine is whe e he (keypad
module, LCD sc een, swi ch, LED indica o ) was placed. Figu e 4 shows he housing and
amewo k o he ab ica ed secu i y o ice cabine sys em
Figu e 4: F amewo k o he ab ica ed secu i y o ice cabine sys em
Ha ing ab ica ed he casing/housing and ha ing inished he cons uc ion o he sec ions o
he sys em, he assembling we e ins all he casing. The sec ions we e p ope ly laid ou and
assembled in o he casing whe e he gene al coupling and linkages in o he pe iphe al de ices
ook place. The indica o was b ough ou o indica e when he sys em is powe ed. Powe
swi ch was b ough ou o powe ing he sys em, he keypad was b ough ou o inpu he
passwo d, LCD sc een was also b ough ou o he casing. The inished secu i y o ice cabine
sys em p io o ins alla ion is p esen ed Figu e 5.
Figu e 5: Finished secu i y o ice cabine sys em p io o ins alla ion
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3. Resul s ad Discussions
The i s and second esul s ob ained o access a emp s on he secu i y o ice cabine (see
Tables 2-3), sys em esponse ime a each access a emp (see Figu e), alse ala m b eakdown
(see Figu e), analysis o ba e y li e wi h ime (see Figu e) as well as wi eless ange wi h espec
o success a e (see Figu e). Fu he mo e, esul s ob ained o 5-yea quan i a i e cos
p ojec ions c oss-pla o m compa ibili y a e p esen ed in Tables 4-5.
Table 2: Fi s esul s ob ained om access a emp s on he secu i y o ice cabine
S/N Fi s A emp Rema k Second A emp Rema k
Code LCD Display Code LCD Display
1
3796
Access Denied
W ong code
4479
Access Denied
W ong code
2
4587
Access Denied
W ong
code
6782
Access Denied
W ong code
3
9854
Access Denied
W ong code
4753
Access Denied
W ong code
4
8438
Access Denied
W ong code
1734
Access Denied
W ong code
5
0974
Access Denied
W ong code
0457
Access Denied
W ong code
6
7683
Access Denied
W ong
code
3794
Access Denied
W ong code
7
9357
Access Denied
W ong code
2513
Access Denied
W ong code
8
2753
Access Denied
W ong code
6902
Access Denied
W ong code
9
1583
Access Denied
W ong code
8469
Access Denied
W ong code
10
9653
Access Denied
W ong code
3571
Access Denied
W ong code
11
7343
Access Denied
W ong code
9746
Access Denied
W ong code
12
3659
Access Denied
W ong code
7385
Access Denied
W ong code
13
6741
Access Denied
W ong code
5462
Access Denied
W ong code
14
2582
Access
Denied
W ong code
6731
Access Denied
W ong code
15
4285
Access Denied
W ong code
8452
Access Denied
W ong code
16
5386
Access Denied
W ong code
6904
Access Denied
W ong code
17
8536
Access Denied
W ong code
4631
Access Denied
W ong code
18
3853
Access Denied
W ong code
2237
Access Denied
W ong code
19
7956
Access Denied
W ong code
6410
Access Denied
W ong code
20
4563
Access Denied
W ong code
0577
Access Denied
W ong code
Table 3: Second esul s ob ained om access a emp s on he secu i y o ice cabine
S/N Fi s A emp Rema k Second A emp Rema k
Code LCD Display Code LCD Display
1
6386
Access Denied
W ong code
4754
Access G an ed
Co ec code
2
7548
Access Denied
W ong code
5843
Access Denied
W ong code
3
9064
Access Denied
W ong code
4754
Access G an ed
Co ec code
4
3595
Access Denied
W ong code
3794
Access Denied
W ong code
5
0653
Access Denied
W ong code
4754
Access G an ed
Co ec code
6
0085
Access Denied
W ong code
2941
Access Denied
W ong code
7
3695
Access Denied
W ong code
0358
Access Denied
W ong code
8
6842
Access Denied
W ong code
4976
Access Denied
W ong code
9
1505
Access Denied
W ong code
4754
Access G an ed
Co ec code
10
8472
Access Denied
W ong code
6930
Access Denied
W ong code
11
7004
Access Denied
W ong code
1443
Access Denied
W ong code
12
3683
Access Denied
W ong code
4754
Access G an ed
Co ec code
13
2584
Access Denied
W ong code
0947
Access Denied
W ong code
14
8583
Access Denied
W ong code
4754
Access G an ed
Co ec code
15
9659
Access Denied
W ong code
6570
Access Denied
W ong code
16
2706
Access Denied
W ong code
3375
Access Denied
W ong code
17
3705
Access Denied
W ong code
4754
Access G an ed
Co ec code
18
8489
Access Denied
W ong code
4763
Access Denied
W ong code
19
3526
Access Denied
W ong code
4754
Access G an ed
Co ec code
20
0253
Access Denied
W ong code
4864
Access Denied
W ong code
In e na ional Jou nal o Ad anced Scien i ic and Technical Resea ch ISSN 2249-9954
A ailable online on h p://www. spublica ion.com/ijs /index.h ml olume 15, No. 5, 2025
O iginal A icle
©2025 RS Publica ion, [email p o ec ed]
185
3.1 Access A emp s on he Secu i y O ice Cabine
Table 2 p esen s he ini ial se o access ials conduc ed on he ab ica ed secu i y
au hen ica ion o ice cabine sys em. In all 20 a emp s, andomly gene a ed codes we e en e ed
in o he keypad. The ou comes consis en ly displayed “Access Denied,” wi h he LCD
indica ing a w ong code o each en y. This es was c ucial in alida ing he cabine ’s
esilience agains b u e- o ce o andom guess a emp s.
The esul s demons a e he sys em’s 100% e ec i eness in ejec ing unau ho ized access
codes du ing he i s s age o ials. This implies ha he embedded mic ocon olle
(ATMEGA328PU), combined wi h he p og ammed passwo d e i ica ion logic, can eliably
il e ou in alid en ies wi hou any lapses. F om a secu i y s andpoin , he ou comes ein o ce
he obus ness o he cabine in ejec ing non- egis e ed codes and i s sui abili y o
en i onmen s whe e sensi i e iles equi e s ong access con ol.
On he hand, Table 3 illus a es a second ound o ials, whe e co ec au ho iza ion codes
we e in en ionally in oduced among o he andom en ies. Unlike Table 2, he sys em g an ed
access in six ou o 20 cases when he co ec code (4754) was supplied. The LCD displayed
“Access G an ed,” alida ing success ul au hen ica ion. The esul s e lec a 99%
au hen ica ion accu acy, as only legi ima e codes we e accep ed while inco ec inpu s we e
denied. Impo an ly, no unau ho ized access was obse ed, highligh ing ha he sys em
achie es he delica e balance o high selec i i y ( ejec ing alse codes) and accessibili y
(g an ing pe mission o alid use s). This p o ides assu ance ha , in p ac ical deploymen ,
o ice s a will expe ience eliable access while in ude s emain locked ou .
3.2 Sys em Response Time a Each Access A emp
Figu e 6 shows he sys em’s esponse ime o bo h success ul and ailed a emp s. On a e age,
he cabine esponded in less han 2 seconds, a c i ical ac o in ensu ing use con enience and
eal- ime secu i y. The g aph illus a es minimal a ia ions in esponse imes ac oss ials,
indica ing s able pe o mance o he mic ocon olle and wi eless communica ion modules.
Quick esponse imes mean use s a e no delayed in gaining legi ima e access, while in ude s
a e ins an ly denied, educing oppo uni ies o ampe ing.
Figu e 7 highligh s he sys em’s alse ala m analysis. Resul s showed ha alse ala m
occu ence was limi ed o jus 1.2% o cases, ypically igge ed by p olonged keypad
ampe ing o ne wo k delays in he GSM module. This low alse ala m a e demons a es he
sys em’s eliabili y and use - iendliness. Many con en ional ala m sys ems su e om
excessi e alse igge s, which educe us and inc ease ope a ional cos s. By minimizing alse
ala ms, his design enhances con idence and ope a ional e iciency in o ice se ings.
