EUIMID
Encyclopedia
EUIMID is a unique identifier
for an R-UIM
(Removable User Identity Module) or CSIM (CDMA SIM
application) card in CDMA2000
cellular systems that replaces the older UIMID
identifier.
There are two forms of EUIMID, known as Short Form (SF_EUIMID) and Long Form (LF_EUIMID). Both forms produce a 32-bit pseudo-UIMID
(pUIMID) with 0x80 in the upper 8 bits and the least significant 24 bits of the SHA-1 hash of the entire SF_EUIMID or the entire ICCID EF (for LF_EUIMID) in the lower 24 bits.
The EUIMID (and UIMID
) are hardware identifiers that do not change throughout the life of the device they identify. Their most important characteristic is that they are globally unique, no two R-UIM
devices should ever be given the same number. Secondly, they can identify the issuer of the code (likely a mobile phone operator in the case of LF_EUIMID, and an R-UIM
or CSIM card manufacturer in the case of SF_EUIMID). The pseudo-UIMID is not unique, but can satisfy most uses of UIMID
. Where this is not possible, or not desirable, another unique identifier should be used instead or the requirement for uniqueness should be removed.
and is allocated from the same numbering space by the current Global Hexadecimal Administrator (GHA), the TIA
. This form requires new files within the R-UIM
defined in 3GPP2 specification C.S0023-C v1.0 (or higher). This was published by the TIA
as TIA-820-C.
The SF_EUIMID has the unique ability to override the phone’s own MEID
in signaling. This is controlled by a flag inside the R-UIM
stored in bit 2 of the UsgInd (Usage Indicator) elementary file (EF). This may make it easier to provision a R-UIM
that is manufactured without other unique identifiers (such as MIN
or IMSI). The tradeoff is that the phone hardware cannot be easily identified. This tradeoff was removed in 2008 by the ability to specify MEID
or EUIMID in OTASP signaling and in 2009 by the addition of these options to the CDMA air interface StatusRequest message.
cards for GSM. This is composed of up to 18 BCD
digits -- up to 72 bits. The storage allocated for the ICCID is, however, 80 bits, so it is recommended that the Luhn check digit be included plus a padding digit (0xf). Importantly, it is recommended in Version 2.0 of C.S0023-Cthat the pseudo-UIMID is generated from all 80 stored bits.
The LF_EUIMID first became externally accessible in 2008 with OTASP specification C.S0066-0 v2.0. In 2009, the CDMA air interface was also upgraded to the so-called 'Release E' which allows the transmission of all available identifiers in the StatusRequest message. If an R-UIM
or CSIM with Expanded UIMID is inserted in a phone the identifier that is usually transmitted as the ESN
protocol element over the radio interface is the 32-bit pseudo-UIMID.
Unique identifier
With reference to a given set of objects, a unique identifier is any identifier which is guaranteed to be unique among all identifiers used for those objects and for a specific purpose...
for an R-UIM
R-UIM
Removable User Identity Module is a card developed for cdmaOne/CDMA2000 handsets that extends the GSM SIM card to CDMA phones and networks. To work in CDMA networks, the R-UIM contains an early version of the CSIM application. The card also contains SIM application, so it can work on both...
(Removable User Identity Module) or CSIM (CDMA SIM
Subscriber Identity Module
A subscriber identity module or subscriber identification module is an integrated circuit that securely stores the International Mobile Subscriber Identity and the related key used to identify and authenticate subscriber on mobile telephony devices .A SIM is held on a removable SIM card, which...
application) card in CDMA2000
CDMA2000
CDMA2000 is a family of 3G mobile technology standards, which use CDMA channel access, to send voice, data, and signaling data between mobile phones and cell sites. The set of standards includes: CDMA2000 1X, CDMA2000 EV-DO Rev. 0, CDMA2000 EV-DO Rev. A, and CDMA2000 EV-DO Rev. B...
cellular systems that replaces the older UIMID
UIMID
A UIMID is a 32-bit Electronic Serial Number stored in a R-UIM or CSIM used for TDMA or CDMA2000 phones . It is given a different name to avoid confusion with the hardware ESN stored in the phone. In all known systems the UIMID displaces the ESN in signaling...
identifier.
There are two forms of EUIMID, known as Short Form (SF_EUIMID) and Long Form (LF_EUIMID). Both forms produce a 32-bit pseudo-UIMID
UIMID
A UIMID is a 32-bit Electronic Serial Number stored in a R-UIM or CSIM used for TDMA or CDMA2000 phones . It is given a different name to avoid confusion with the hardware ESN stored in the phone. In all known systems the UIMID displaces the ESN in signaling...
(pUIMID) with 0x80 in the upper 8 bits and the least significant 24 bits of the SHA-1 hash of the entire SF_EUIMID or the entire ICCID EF (for LF_EUIMID) in the lower 24 bits.
The EUIMID (and UIMID
UIMID
A UIMID is a 32-bit Electronic Serial Number stored in a R-UIM or CSIM used for TDMA or CDMA2000 phones . It is given a different name to avoid confusion with the hardware ESN stored in the phone. In all known systems the UIMID displaces the ESN in signaling...
) are hardware identifiers that do not change throughout the life of the device they identify. Their most important characteristic is that they are globally unique, no two R-UIM
R-UIM
Removable User Identity Module is a card developed for cdmaOne/CDMA2000 handsets that extends the GSM SIM card to CDMA phones and networks. To work in CDMA networks, the R-UIM contains an early version of the CSIM application. The card also contains SIM application, so it can work on both...
devices should ever be given the same number. Secondly, they can identify the issuer of the code (likely a mobile phone operator in the case of LF_EUIMID, and an R-UIM
R-UIM
Removable User Identity Module is a card developed for cdmaOne/CDMA2000 handsets that extends the GSM SIM card to CDMA phones and networks. To work in CDMA networks, the R-UIM contains an early version of the CSIM application. The card also contains SIM application, so it can work on both...
or CSIM card manufacturer in the case of SF_EUIMID). The pseudo-UIMID is not unique, but can satisfy most uses of UIMID
UIMID
A UIMID is a 32-bit Electronic Serial Number stored in a R-UIM or CSIM used for TDMA or CDMA2000 phones . It is given a different name to avoid confusion with the hardware ESN stored in the phone. In all known systems the UIMID displaces the ESN in signaling...
. Where this is not possible, or not desirable, another unique identifier should be used instead or the requirement for uniqueness should be removed.
Short Form EUIMID (SF_EUIMID)
The Short Form EUIMID is based on the 56-bit MEIDMEID
A mobile equipment identifier is a globally unique number identifying a physical piece of CDMA mobile station equipment. The number format is defined by the but in practical terms it can be seen as an IMEI but with hexadecimal digits....
and is allocated from the same numbering space by the current Global Hexadecimal Administrator (GHA), the TIA
Telecommunications Industry Association
The Telecommunications Industry Association is accredited by the American National Standards Institute to develop voluntary, consensus-based industry standards for a wide variety of ICT products, and currently represents nearly 400 companies...
. This form requires new files within the R-UIM
R-UIM
Removable User Identity Module is a card developed for cdmaOne/CDMA2000 handsets that extends the GSM SIM card to CDMA phones and networks. To work in CDMA networks, the R-UIM contains an early version of the CSIM application. The card also contains SIM application, so it can work on both...
defined in 3GPP2 specification C.S0023-C v1.0 (or higher). This was published by the TIA
Telecommunications Industry Association
The Telecommunications Industry Association is accredited by the American National Standards Institute to develop voluntary, consensus-based industry standards for a wide variety of ICT products, and currently represents nearly 400 companies...
as TIA-820-C.
The SF_EUIMID has the unique ability to override the phone’s own MEID
MEID
A mobile equipment identifier is a globally unique number identifying a physical piece of CDMA mobile station equipment. The number format is defined by the but in practical terms it can be seen as an IMEI but with hexadecimal digits....
in signaling. This is controlled by a flag inside the R-UIM
R-UIM
Removable User Identity Module is a card developed for cdmaOne/CDMA2000 handsets that extends the GSM SIM card to CDMA phones and networks. To work in CDMA networks, the R-UIM contains an early version of the CSIM application. The card also contains SIM application, so it can work on both...
stored in bit 2 of the UsgInd (Usage Indicator) elementary file (EF). This may make it easier to provision a R-UIM
R-UIM
Removable User Identity Module is a card developed for cdmaOne/CDMA2000 handsets that extends the GSM SIM card to CDMA phones and networks. To work in CDMA networks, the R-UIM contains an early version of the CSIM application. The card also contains SIM application, so it can work on both...
that is manufactured without other unique identifiers (such as MIN
Min
Min may refer to:*Min , an Egyptian fertility god*Min , a modern working copy of an Ancient Egyptian ship of Hatshepsut's time*Min , a South Korean celebrity most popularly known as a member of miss A*Min *Min River...
or IMSI). The tradeoff is that the phone hardware cannot be easily identified. This tradeoff was removed in 2008 by the ability to specify MEID
MEID
A mobile equipment identifier is a globally unique number identifying a physical piece of CDMA mobile station equipment. The number format is defined by the but in practical terms it can be seen as an IMEI but with hexadecimal digits....
or EUIMID in OTASP signaling and in 2009 by the addition of these options to the CDMA air interface StatusRequest message.
Long Form EUIMID (LF_EUIMID)
The Long Form EUIMID is the ICCID that has been present in many generations of smart cards, including the SIMSubscriber Identity Module
A subscriber identity module or subscriber identification module is an integrated circuit that securely stores the International Mobile Subscriber Identity and the related key used to identify and authenticate subscriber on mobile telephony devices .A SIM is held on a removable SIM card, which...
cards for GSM. This is composed of up to 18 BCD
Binary-coded decimal
In computing and electronic systems, binary-coded decimal is a digital encoding method for numbers using decimal notation, with each decimal digit represented by its own binary sequence. In BCD, a numeral is usually represented by four bits which, in general, represent the decimal range 0 through 9...
digits -- up to 72 bits. The storage allocated for the ICCID is, however, 80 bits, so it is recommended that the Luhn check digit be included plus a padding digit (0xf). Importantly, it is recommended in Version 2.0 of C.S0023-Cthat the pseudo-UIMID is generated from all 80 stored bits.
The LF_EUIMID first became externally accessible in 2008 with OTASP specification C.S0066-0 v2.0. In 2009, the CDMA air interface was also upgraded to the so-called 'Release E' which allows the transmission of all available identifiers in the StatusRequest message. If an R-UIM
R-UIM
Removable User Identity Module is a card developed for cdmaOne/CDMA2000 handsets that extends the GSM SIM card to CDMA phones and networks. To work in CDMA networks, the R-UIM contains an early version of the CSIM application. The card also contains SIM application, so it can work on both...
or CSIM with Expanded UIMID is inserted in a phone the identifier that is usually transmitted as the ESN
Electronic Serial Number
Electronic serial numbers were created by the U.S. Federal Communications Commission to uniquely identify mobile devices, from the days of AMPS in the United States from the early 1980s. The administrative role was taken over by the Telecommunications Industry Association in 1997 and is still...
protocol element over the radio interface is the 32-bit pseudo-UIMID.