125kHz vs 13.56MHz: Tus nqi ntawm Kev Tswj Xyuas Cov Ntawv Pov Thawj
Jan 08, 2026
Tso lus
125kHz vs 13.56MHz: Tus nqi ntawm Kev Tswj Xyuas Cov Ntawv Pov Thawj
Teb ceev:125kHz cov ntaub ntawv pov thawj kev nkag mus siv feem ntau pheej yig dua, yooj yim dua rau qhov chaw, thiab sib haum nrog cov neeg nyeem nyob sib ze, tab sis ntau LF chips tsuas yog xa ib daim ID ruaj khov . 13.56MHz daim ntawv pov thawj raug nqi ntau dua thaum lawv siv cov chips ruaj ntseg xws li MIFARE Plus SL3 lossis DESFire EV2 / EV3, tab sis lawv muaj peev xwm txhawb nqa kev tswj hwm, kev nkag tau zoo thiab kev nco. Qhov kev txiav txim siab tiag tiag tsis yog 125kHz vs 13.56MHz xwb; nws yog hom nti, nyeem ntawv teeb tsa, encoding txoj kev, thiab tag nrho cov tswv cuab tus nqi.
Kaum tsib vib nas this los clone ib 125kHz keyfob. ICT pab pawg kev ruaj ntseg tau sim qhov no hauv 2023 nrog $ 30 Amazon ntaus ntawv -unboxing ua haujlwm duplicate, kaum tsib vib nas this. LawvICT daim npav technology kev ruaj ntseg sib pivtsim nyog nyeem yog tias koj xav tau cov txheej txheem thiab cov ntsiab lus ntawm kev tsiv teb tsaws dav dua.
Peb tau nug txog kev xaiv ntau zaus ntawm Syntek. Cov neeg ua haujlwm muag khoom xav tau cov lus teb yooj yim, thiab tsis muaj ib qho. Zaus txiav txim physics. Chip xaiv txiav txim siab kev ruaj ntseg. Kev tsim khoom zoo txiav txim siab seb cov ntaub ntawv pov thawj tau ntev li tsib xyoos lossis ua tsis tiav tom qab rau lub hlis. Cov no yog kev txiav txim siab cais.
125kHz vs 13.56MHz nkag tau cov ntaub ntawv pov thawj: qhov sib txawv ntawm cov tswv yim
| Kev txiav txim Point | 125kHz LF Daim Ntawv Pov Thawj | 13.56MHz HF Daim Ntawv Pov Thawj |
|---|---|---|
| Yam khoom siv chips | EM4100, TK4100, T5577, HID Prox- tau tshaj tawm tswv yim | MIFARE Classic, MIFARE Plus, DESFire EV2, DESFire EV3, NTAG for NFC use case |
| Lub ntsiab kom zoo dua | Tus nqi qis dua, kev nyeem ntawv ruaj khov, kev sib raug zoo ntawm cov cuab yeej cuab tam | Ntau lub cim xeeb, ob- txoj kev sib txuas lus, kev xaiv muaj kev lees paub muaj zog dua |
| Kev pheej hmoo loj | Ntau qhov ruaj khov -ID chips tsis muaj encryption lossis kev sib tw- teb | Kev ruaj ntseg nyob ntawm chip tsev neeg thiab kev teeb tsa nyeem ntawv; CSN{0}} tsuas yog nyeem ntawv tsis muaj zog |
| Zoo tshaj plaws | Tsawg- qhov rooj uas pheej hmoo, pas dej ua ke, gyms, kev saib xyuas qub txeeg qub teg, daim ntawv pov thawj ib ntus | Kev nkag mus hauv tuam txhab, tsev so systems, ntau- daim ntawv thov, siab dua- thaj chaw nyab xeeb |
| Yuav yuam kev kom zam | Siv qhov ruaj khov -ID cov ntaub ntawv pov thawj sib thooj raws li kev tswj hwm rau kev nkag siab | Yuav cov chips ruaj ntseg tab sis teeb tsa cov neeg nyeem kom paub tseeb tsuas yog daim npav naj npawb |
Rau cov lus qhia sib sib zog nqus xaiv thoob plaws RFID keyfob tej yaam num, saib peb tsab xov xwm ntawmxaiv qhov zoo zaus rau RFID keyfobs. Rau qhov nruab nrab kev saib xyuas ntawm qhov sib thooj, MIFARE, thiab DESFire daim npav sib txawv,Kev sib thooj, MIFARE thiab DESFire kev piav qhiakuj tseem siv tau.
Ntawm 125kHz, electromagnetic nthwv dej ob peb inductively ntawm tus kav hlau txais xov keyfob thiab nyeem ntawv. ruaj khov coupling. Dej tsis attenuate heev. Cov chaw hlau tsis tsim cov qauv cuam tshuam uas koj pom ntawm cov zaus ntau dua- yog vim li cas kev tswj xyuas thaum ntxov raws li LF thev naus laus zis.
EM4100 thiab TK4100 chips tshaj tawm 64-ntsis tus cim hauv qhov tseeb. Tsis muaj encryption, tsis muaj kev sib tw teb, tsis muaj kev lees paub. Tus nyeem ntawv nug "koj yog leej twg?" thiab lub nti teb nrog nws tus ID, txhua zaus, rau leej twg nug. Clone li sau cov lus teb thiab rov ua nws dua.
Peb tseem muag EM4100 keyfobs. Ntau ntawm lawv. Kev nkag mus rau hauv pas dej ua ke, sab hauv cheeb tsam sib cais, daim ntawv pov thawj ntawm tus neeg ua haujlwm ib ntus. Muaj cov xwm txheej siv raug cai uas qhov kev txwv kev nyab xeeb tau txais thiab tus nqi kom zoo dua qhov tseem ceeb -$ 0.15-0.30 ib chav nyob ntawm qhov ntim piv rau $2.50+ kom ruaj ntseg HF chips. Yog tias koj qhov project xav tau cov tsev nyob ruaj khov, luam ntawv logo, cov lej cim, thiab ntau yam LF / HF nti xaiv, pib nrogKev cai ABS RFID keyfobs rau kev tswj xyuas.
Peb yuav tsis pom zoo rau lawv thawj lub tsev nkag. Kev lav phib xaub tsis tsim nyog rau kev txuag nyiaj.
Tsiv mus rau 13.56MHz tsis tuaj yeem daws teeb meem kev nyab xeeb.
13.56MHz yog ib qhov zaus band, tsis yog qib kev ruaj ntseg. MIFARE Classic, MIFARE Plus hauv Kev Ruaj Ntseg Qib 3, thiab DESFire EV2 / EV3 txhua tus zaum hauv HF ntiaj teb, tab sis lawv coj txawv txawv hauv lub qhov rooj. Tus nqi qis - tus nqi 13.56MHz daim ntawv pov thawj siv los ntawm UID lossis CSN nkaus xwb tsis yog piv rau DESFire daim ntawv thov siv ntau tus yuam sij thiab encrypted kev sib nrig sib authentication.
MIFARE Classic yog tus qauv kev lag luam rau xyoo. ISO14443A raws, 1KB lossis 4KB nco, txhawb nqa dav. Crypto1 encryption zoo li txaus. Cov kws tshawb fawb ntawm Radboud University tsoo nws hauv 2008-qhov tseem ceeb cryptographic tsis muaj zog, tsis muaj firmware kho tau. Lub xov tooj Android nrog MIFARE Classic Tool tuaj yeem clone cov ntawv pov thawj tam sim no.
Peb xa Classic-fob keyfobs rau kev saib xyuas qub txeeg qub teg. Yog tias koj lub tsev muaj 50 tus neeg nyeem khiav MIFARE Classic thiab tsis muaj peev xwm hloov kho dua tshiab, yuav tshiab Classic keyfobs ua rau kev nkag siab. Hloov lawv nrog DESFire yuav tsis pab yog tias cov nyeem tsis tuaj yeem ua encrypted authentication lawm.
Kev xa tawm tshiab? Classic tsis yog - pib. Lub Peb Hlis 2024 Unsaflok nthuav tawm-3 lab lub tsev so kaw thoob plaws 13,000 thaj chaw-yuav tsum tau xaus qhov kev sib cav.
Cov kev xaiv HF ruaj ntseg: MIFARE Plus hauv SL3 hom nrog AES enabled, DESFire EV2, DESFire EV3. Txhua yam siv AES-128. DESFire EV2 thiab EV3 nqa EAL5+ ntawv pov thawj rau kev ua raws-sensitive deployments. NXP covMIFARE DESFire EV3 cov ntaub ntawv cov khoomkuj tseem muaj ntaub ntawv ISO/IEC 14443A kev ua raws cai, kho vajtse cryptographic kev them nyiaj yug, hloov tau yooj yim daim ntawv thov kev tswj, thiab Common Criteria EAL5+ ntawv pov thawj.
Lub DESFire keyfob ntawm qhov kev teeb tsa tsis raug tsis muaj kev ruaj ntseg ntau dua li EM4100. Pab pawg Flipper Zero tau sau tseg qhov no hauv lawv 2023 RFID raws tu qauv tsom xam: ntau cov kev tswj xyuas kev nkag mus tau lees paub siv tsuas yog Daim Npav Serial Number, txawm tias nrog DESFire cov neeg nyeem tau teeb tsa. CSN yog unencrypted, nyeem tau los ntawm ib qho khoom siv NFC. $ 4 DESFire keyfob authenticating ntawm CSN ua haujlwm ntawm $ 0.20 LF qib kev ruaj ntseg.
Peb nug cov neeg siv khoom kom paub meej tias tus nyeem ntawv teeb tsa ua ntej hais. "Puas yog koj lub kaw lus pov thawj siv cov ntaub ntawv encrypted, lossis tsuas yog CSN?" Yog tias lawv tsis paub, peb qhia lawv kom paub ua ntej siv nyiaj rau daim ntawv pov thawj hwm. Peb qhia rauRFID cov ntaub ntawv kev ruaj ntseg rau kev nkag mus rau cov ntaub ntawv pov thawjpiav qhia tias yog vim li cas cov ID ruaj khov, cov lus teb rov qab tau, cov yuam sij ua ntej, thiab tsis muaj zog backend validation tuaj yeem ua rau muaj lwm yam kev lees paub kim.
Cov neeg nyeem ntawv txheeb xyuas qhov ua tau zoo ua ntej xaj DESFire lossis MIFARE Plus:
1. Puas yog tus nyeem ntawv txhawb 13.56MHz ISO14443A, lossis tsuas yog 125kHz LF?
2. Puas yog tus maub los lees txais cov ntaub ntawv thov encrypted, lossis tsuas yog Wiegand tso tawm los ntawm tus lej npav?
3. Puas yog cov yuam sij sib txawv ntawm ib qhov chaw, ib daim npav, lossis muab faib ua tus yuam sij vim li cas?
4. Koj tus neeg koom ua ke puas tuaj yeem nkag siab cov ntaub ntawv pov thawj ua ntej xa mus, lossis koj puas xav tau tus neeg xa khoom ua ntej -encoding?
5. Cov ntawv pov thawj qub puas tuaj yeem tshem tawm kom huv hauv kev siv software?
Yog tias koj cov khoom siv uas twb muaj lawm tsis tuaj yeem pab txhawb txoj kev lees paub qhov tseeb koj npaj yuav yuav, qhov kev hloov kho tshiab yuav ua tsis tiav ntawm lub qhov rooj. Nyob rau hauv tas li ntawd, rov xyuas lubRFID access control reader configurationua ntej pom zoo ntau lawm.
Tus nqi qauv ntawm RFID daim ntawv pov thawj yog nruj heev tsis yog -linear nrog ntim.
Chav tsev tus nqi tsuas yog ib feem ntawm kev nkag mus rau daim ntawv pov thawj. Cov peev nyiaj tiag tiag suav nrog qib nti, cov khoom siv plhaub, luam ntawv, UID lossis cov khoom lag luam encoding, kuaj cov qauv, sib piv cov ntaub ntawv, ntim khoom, kev tuav tsis raug, thiab cov ntim rov qab rau yav tom ntej. Tus neeg yuav khoom sib piv tsuas yog "125kHz tus nqi" thiab "13.56MHz tus nqi" tuaj yeem xaiv cov khoom pheej yig tshaj plaws thiab tseem them nyiaj ntau tom qab los ntawm kev nyeem tsis tau, rov- ua haujlwm encoding, hloov tus nyeem ntawv, lossis daim pib txhawb nqa.
| Chip Hom | 100 units | 1,000 units | 5, 000+ units |
|---|---|---|---|
| EM4100/TK4100 (125kHz) | $0.80-1.50 | $0.25-0.40 | $0.15-0.25 |
| T5577 rewritable (125kHz) | $1.20-2.00 | $0.45-0.70 | $0.30-0.50 |
| MIFARE Classic 1K (13.56MHz) | $1.00-2.00 | $0.40-0.80 | $0.30-0.60 |
| DESFire EV2 (13.56MHz) | $4.00-6.00 | $2.50-3.50 | $2.00-3.00 |
| DESFire EV3 (13.56MHz) | $5.00-8.00 | $3.00-4.50 | $2.50-3.50 |
Tus thawj tswj hwm vaj tse xaj 200 keyfobs them kwv yees li 3x ntau dua rau ib chav tshaj li ib qho xaj 2,000. Ntau- cov neeg ua haujlwm hauv lub vev xaib sib sau ua ke ntawm cov khoom. Cov koom haum uas muaj peev xwm hloov pauv tau txiav txim siab txhua xyoo ua ntej.
T5577 occupies ib tug tshwj xeeb txoj hauj lwm. Tsis zoo li qhov ruaj khov -UID chips, nws yog thaj chaw -programmable nrog 330 me ntsis ntawm kev teeb tsa lub cim xeeb- tuaj yeem ua raws li EM4100, HID Prox, Indala, ntau lwm yam kev cai. Cov chaw tswj hwm cov txheej txheem qub txeeg qub teg los ntawm ntau tus neeg muag khoom, cov neeg koom ua ke xav tau ntawm - qhov chaw kho dua tshiab: T5577 muab kev hloov pauv uas ua rau pom tseeb tus nqi qis tshaj EM4100. Kev tiv thaiv 32-ntsis lo lus zais tsis muaj zog los ntawm cov qauv niaj hnub no, tab sis nws txwv tsis pub cloning xws li.
Cov nqi zais cov neeg yuav khoom feem ntau nco
| Tus nqi | Vim Li Cas Nws Tseem Ceeb | Yuav Tswj Li Cas |
|---|---|---|
| Encoding thiab numbering | Cov chaw tsis raug cai, cov qauv me me tsis raug, lossis cov ntaub ntawv tsis raug cai tuaj yeem ua rau daim npav nyeem tau tab sis siv tsis tau. | Paub meej Wiegand hom, daim npav naj npawb ntau, qhov chaw code, thiab cov ntaub ntawv encoding ua ntej ntau lawm. |
| Kev sim ua qauv | Cov qauv nyeem ntawv, cov tswj qhov rooj, thiab software versions yuav coj txawv txawv nrog tib lub nti. | Kuaj 5-10 cov qauv ntawm lub qhov rooj tiag tiag ua ntej kev txiav txim ntau pom zoo. |
| Hloov nyeem ntawv | Cov ntaub ntawv pov thawj HF ruaj ntseg yuav xav tau cov neeg nyeem tshiab yog tias cov khoom qub qub tsuas yog txhawb nqa LF cov ID ruaj khov. | Tshawb xyuas cov neeg nyeem ua ntej txiav txim siab ntawm ib zaug - zaus, dual- zaus, lossis ntau- thev naus laus zis tsiv teb tsaws. |
| Tus nqi ua tsis tiav | Ib pawg pheej yig nrog cov kav hlau txais xov tsis muaj zog lossis cov vaj tsev tsis zoo tuaj yeem tsim kev txhawb nqa ntau dua li kev txuag. | Nug rau kev kuaj kav hlau txais xov, cov khoom siv specs, thiab cov ntaub ntawv khaws cia ib puag ncig. |
| Kev tshaj tawm yav tom ntej | Txhua daim npav poob, tus neeg xauj tsev tshiab, tus neeg ua haujlwm tshiab, lossis daim ntawv cog lus rov ua dua tus nqi lees paub. | Siv cov phiaj xwm ntim txhua xyoo thiab zam kev ruaj ntseg dual -frequency premiums tshwj tsis yog xav tau. |
Manufacturing zoo yog qhov uas pheej yig keyfobs tsis.
Lub kav hlau txais xov sab hauv 125kHz keyfob: tooj liab hlau raug mob nyob ib ncig ntawm lub ferrite core. Ferrite txhim kho kev sib nqus sib nqus zoo heev-Cov ntaub ntawv tshawb fawbGate qhia tau hais tias ferrite- cov tub ntxhais coils ua tiav kwv yees li 125x qhov sib txuas ua haujlwm ntawm huab cua sib npaug- cov qauv tsim.
Qhov zoo ntawm cov ferrite, winding precision, tuning capacitor zoo ib yam -cov no txiav txim siab seb tus keyfob nyeem tau kev ntseeg siab ntawm cov qauv nyeem sib txawv.
Ntawm 13.56MHz, tus kav hlau txais xov yog feem ntau etched tooj liab ntawm PCB substrate. Tighter manufacturing tolerances, tab sis resonant zaus yog rhiab heev rau ib puag ncig yam. Mount ib HF keyfob tiv thaiv ib tug hlau keychain, lub kav hlau txais xov detunes, nyeem ntau poob 30-50%. Cov tuam txhab lag luam zoo them nyiaj rau tus kav hlau txais xov tsim thiab tshawb xyuas nrog VNA kuaj thaum lub sijhawm tsim khoom.
Peb tau pom cov khoom lag luam los ntawm cov nqi qis - tus nqi muag khoom nrog tus nqi tsis zoo tshaj 8%. Ntawm $0.10 tsawg dua rau ib chav, qhov ntawd tsis txuag nyiaj - nws yog tus nqi txhawb nqa mus rau tus neeg siv khoom.
Cov ntaub thaiv npog tseem ceeb. ABS yas yog tus qauv kev lag luam: cuam tshuam tsis kam, tshuaj lom neeg ruaj khov, RF pob tshab. Pheej yig PP compounds tawg thaum huab cua txias. Peb muaj cov neeg siv khoom nyob rau sab qaum teb Europe pom qhov no thaum lub Kaum Ob Hlis Ntuj kub ua rau muaj kev lees paub thoob plaws lawv cov ntaub ntawv.
Rau kev teeb tsa sab nraum zoov: IP65 tuav nag thiab plua plav, IP68 yog ntsuas rau submersion. Tus nqi sib txawv yog $0.15-0.25 rau ib chav. Hla qhov kev txhim kho thiab hloov cov ntaub ntawv pov thawj dej puas raug nqi ntau dua.
Thaum twg upgraded ntawm 125kHz mus rau 13.56MHz them?
Cov ntaub ntawv lag luam rau kev hloov kho dua tshiab los ntawm LF qub txeeg qub teg kom ruaj ntseg HF nyob ntawm cov ntsiab lus tseem ceeb. Cov ntaub ntawv muaj zog tshaj plaws tshwm sim thaum cov ntaub ntawv pov thawj tiv thaiv siab - thaj chaw muaj txiaj ntsig, thaum tshawb xyuas txoj hauv kev tseem ceeb, thaum cov ntaub ntawv pov thawj cloned yuav tsim kev raug cai, lossis thaum tib daim npav xav tias yuav txhawb nqa ntau daim ntawv thov xws li kev nkag mus rau hauv tsev, chaw nres tsheb, elevator, lockers, vending, lossis tus nqi koom nrog.
Cov phiaj xwm no tuaj yeem ua tsis tiav. Peb tau pom cov kev hloov kho tshiab uas raug nqi ntau dua li qhov kev xav tau, siv sijhawm ntev dua li kev npaj, xav tau cov neeg nyeem hloov pauv sab nraum qhov qub. ROI nyob ntawm qhov xwm txheej tshwj xeeb: cov txheej txheem uas twb muaj lawm, ib puag ncig kev hem thawj, hloov pauv tus nqi, kev tswj hwm qhov project zoo.
Tus nqi sib txawv ntawm cov ntawv pov thawj ruaj ntseg thiab tsis ruaj ntseg tau nqaim heev. DESFire EV2 uas raug nqi $ 8-10 txhua xyoo 2019 yog tam sim no $ 2.50-3.50 ntawm ntim.
Dual{0}}frequency keyfobs embed ob qho tib si 125kHz thiab 13.56MHz antennas. Peb tsim lawv. Peb txhawb cov neeg siv khoom los ntawm kev qhia lawv tshwj tsis yog tias tsis muaj txoj kev hloov pauv meej.
Ob lub kav hlau txais xov nyob ze ob peb nrog ib leeg, detuning ob leeg. Cov kev cai ntawm lub cev sib cais ntxiv ntau. Txhua tus kav hlau txais xov yuav tsum tau ua kom zoo ntawm nws tus kheej, kev cuam tshuam hauv ib qho cuam tshuam rau lwm tus. Manufacturing complexity nce tus nqi defect. Tus 40-60% tus nqi tshaj ib zaug ib zaug feem ntau muab kev cuam tshuam kev ua haujlwm ntawm ob zaus.
Qhov twg dual{0}} zaus ua rau kev nkag siab:
Npaj LF-rau-HF tsiv teb tsaws siv sijhawm 12-24 lub hlis uas cov ntaub ntawv pov thawj yuav tsum ua haujlwm ntawm ob lub tshuab thaum hloov pauv.
Qhov twg nws tsis:
Kev xa tawm mus tas li them tus nqi them tsis tas li rau kev muaj peev xwm yeej tsis siv.
Rau ntau- cov tsev xauj tsev nrog cov tshuab sib txawv ntawm cov plag tsev sib txawv, cov ntawv pov thawj cais feem ntau siv tau ntau dua. Tsawg elegant, ua haujlwm zoo dua, raug nqi tsawg dua lub sijhawm.
Lub tshuab nqus tsev LF-rau-HF txoj kev npaj tsiv teb tsaws chaw feem ntau yog theem los ntawm kev pheej hmoo. Txhim kho chav neeg rau zaub mov, chaw ua haujlwm nyiaj txiag, warehouses, thiab cov chaw nkag nkag ua ntej. Khaws qis- qhov rooj pheej hmoo ntawm qhov qub qub kom txog thaum teem caij hloov tus nyeem ntawv. Thaum lub sijhawm hloov pauv, teeb tsa dual- cov ntawv pov thawj thev naus laus zis tsuas yog rau cov neeg siv uas xav tau ob lub tshuab. Thaum tus nyeem ntawv LF kawg tau so haujlwm, tsis txhob yuav dual- daim ntawv pov thawj zaus thiab txav mus rau ib daim ntawv pov thawj HF ruaj ntseg.
Cov ntsiab lus tshwj xeeb uas tseem ceeb, raws li kev xa tawm tsis ua haujlwm peb tau pom:
Zaus thiab raws tu qauv compatibility.
Txheeb xyuas cov neeg nyeem uas twb muaj lawm txhawb lub nti koj xaj. "13.56MHz" tsis txaus- qhia ISO14443A, ISO15693, lossis cov txheej txheem tsim khoom. Tau txais cov qauv, sim ntawm qhov tseeb infrastructure ua ntej kev txiav txim ntau lawm.
Wiegand format.
Kev nkag mus tswj vaj huam sib luag cia siab tias muaj cov qauv tshwj xeeb-26-ntsis, 34-ntsis, 37-ntsis. Hom ntawv tsis raug txhais tau hais tias keyfob nyeem tab sis tsis lees paub. Paub meej nrog koj tus neeg koom ua ke.
Nco thiab encoding.
DESFire los hauv 2KB, 4KB, 8KB variants. Tib - daim ntawv thov nkag mus tswj: 2 KB txaus. Ntau- daim ntawv thov kev xa mus ua ke nrog kev nkag mus hauv tsev nrog chaw nres tsheb, elevator, muag khoom: tej zaum yuav xav tau lub cim xeeb loj dua. Ua ntej-encoding ntxiv tus nqi tab sis tshem tawm kev ua haujlwm hauv teb. Cov ntaub ntawv pov thawj tsis muaj peev xwm xav tau ntawm - lub peev xwm ntawm qhov chaw.
Environmental specifications.
Kev khiav hauj lwm kub txheem yog -20℃rau +60℃; Kub-kub variants muaj nyob rau ntxhua khaub ncaws thiab autoclave. IP ntsuam xyuas tsim nyog rau kev teeb tsa ib puag ncig. ABS vaj tse, zam kev xaiv pheej yig dua.
Cov ntaub ntawv zoo.
ISO/IEC 10373-6 kev xeem ua raws, Q-factor ntsuas, cov ntawv ceeb toom ib puag ncig. Tus neeg muag khoom tsis tuaj yeem tsim cov ntaub ntawv? Xav txog tus neeg xa khoom rov qab.
Rau kev xa tawm tshiab uas muaj kev ruaj ntseg tseem ceeb: DESFire EV2 ntawm 13.56MHz. EV3 ntxiv qhov kev txhim kho me ntsis ntawm tus nqi hwm tus nqi- nyuaj los ua pov thawj rau tsoomfwv sab nraud lossis siab - muaj nuj nqis tiv thaiv. Paub meej tias encrypted sector authentication, tsis yog CSN- xwb. Nyiaj $2.50-4.00 ib keyfob ntawm ntim.
Rau kev saib xyuas LF qub uas qhov kev txhim kho tsis tuaj yeem ua tau: EM4100 lossis TK4100 rau kev sib raug zoo ntawm tus nqi tsawg. Txais qhov kev txwv kev nyab xeeb kom paub meej. Xav tau ntawm -site reprogramming? Them tus nqi qis rau T5577.
Rau kev hloov pauv: ntau- thev naus laus zis nyeem ntau dua li dual-frequency keyfobs. Tus nyeem ntawv hwm yog ib qho - sij hawm; keyfob premium recurs nrog txhua daim ntawv pov thawj tawm.
Tsis txhob dhau - qhia. Peb tau tshaj tawm cov haujlwm thov DESFire EV3 nrog 8KB nco rau kev koom tes hauv gym-$4+ ib qho keyfob rau kev muaj peev xwm uas lawv yuav tsis siv. DESFire EV2 nrog 2KB ntawm $ 2.50 muab kev ua haujlwm zoo ib yam rau daim ntawv thov ntawd.
Tsis txhob nyob rau hauv - qhia ib yam. Thawj lub tsev nkag nrog EM4100 daim ntawv pov thawj yog qhov kev txiav txim siab kev nyab xeeb, txawm tias ua tau los yog tsis paub. Yog hais tias ib tug neeg clones ib tug keyfob thiab tau txais kev nkag, lo lus nug "vim li cas peb siv technology uas yog trivially cloned?" yuav tuaj.
Kev xaiv ntau zaus tsis nyuaj thaum koj cais cov kev txiav txim siab: physics los ntawm kev ruaj ntseg los ntawm kev tsim khoom zoo. Feem ntau qhov tsis meej pem yog los ntawm kev lag luam uas ua rau lawv sib haum xeeb, lossis kev yuav khoom tsom rau cov nqi tsev yam tsis xav txog tag nrho cov tswv cuab tus nqi. Yog tias koj pab neeg tseem sib piv IC thiab ID daim ntawv pov thawj ntawm qib pib, phau ntawv qhia no rauIC card vs ID daim npav xaiv rau kev tswj kev nkagtuaj yeem pab tsim cov lus qhia ua ntej kev yuav khoom.
FAQ: 125kHz vs 13.56MHz nkag mus tswj cov ntaub ntawv pov thawj
Q: Puas yog 13.56MHz Ib txwm ruaj ntseg dua 125kHz?
A: Tsis yog. 13.56MHz tuaj yeem muaj kev nyab xeeb ntau dua thaum lub kaw lus siv encrypted authentication nrog chips xws li MIFARE Plus SL3 lossis DESFire EV2/EV3. Tab sis yog tias tus nyeem ntawv tsuas yog txheeb xyuas tus lej cim tsis tau sau npe, lub kaw lus tseem tuaj yeem coj tus cwj pwm tsis zoo li - kev ruaj ntseg ID token.
Q: Kuv puas tuaj yeem hloov 125kHz Keyfobs Nrog DESFire Keyfobs yam tsis hloov cov nyeem?
A: Feem ntau tsis yog. Yog tias cov neeg nyeem uas twb muaj lawm tsuas yog txhawb nqa 125kHz qhov sib thooj IDs, lawv tsis tuaj yeem nyeem lossis txheeb xyuas cov ntaub ntawv pov thawj DESFire. Koj xav tau 13.56MHz ISO14443A- nyeem ntawv muaj peev xwm thiab nkag mus rau software uas tuaj yeem tswj cov ntaub ntawv encrypted yuav tsum tau.
Q: Vim li cas DESFire Daim Ntawv Pov Thawj Tseem Ceeb Tshaj?
A: Cov ntaub ntawv pov thawj DESFire siv cov chips uas muaj peev xwm ntau dua, txhawb kev ruaj ntseg ntawm lub cim xeeb, thiab feem ntau yuav tsum muaj kev tswj xyuas qhov tseem ceeb los yog ua ntej - encoding. Tus nqi siab dua them rau kev ruaj ntseg muaj peev xwm, tab sis lub kaw lus yuav tsum tau teeb tsa kom raug rau qhov muaj peev xwm tseem ceeb.
Q: Thaum twg 125kHz tseem txais tau?
A: 125kHz tseem tuaj yeem lees txais rau qhov tsawg - qhov rooj pheej hmoo, kev txheeb xyuas cov tswv cuab yooj yim, kev saib xyuas qub txeeg qub teg, cov neeg cog lus ib ntus, lossis thaj chaw sab hauv uas muaj kev pheej hmoo cloning tsis tsim teeb meem loj. Nws yuav tsum tsis yog tsuas yog daim ntawv pov thawj tiv thaiv nkag nkag nkag.
Q: Kuv Puas Yuav Xaiv Dual -Frequency Keyfobs?
A: Xaiv dual -frequency keyfobs tsuas yog thaum cov neeg siv yuav tsum nkag mus rau ob tus qub LF nyeem ntawv thiab cov neeg nyeem HF tshiab thaum lub sijhawm tsiv teb tsaws. Rau kev xa mus mus tas li, dual- cov ntawv pov thawj zaus feem ntau ntxiv cov nqi rov ua dua thiab tuaj yeem cuam tshuam kev ua haujlwm kav hlau txais xov.
Ua haujlwm los ntawm kev txiav txim siab xa mus? Peb xav pab koj qhia kom raug ua ntej tshaj li debug qhov tsis sib haum xeeb tom qab.
Tus nqi cuam tshuam txog Lub Ib Hlis 2025 tus nqi lag luam wholesale, nws txawv ntawm qhov ntim thiab kev cai encoding. Rau qhov project quotations, hu rau kev muag khoom nrog ntim yuav tsum tau thiab cov ntaub ntawv infrastructure.
Xa kev nug