What is RSA ? - GSM-Forum

Crumarix1 · 10-26-2004, 07:55

Yes, mybe is not wery smart question,but What is the RSA in se phones.
for what is use and why is so important?

and how i can change or put som more games in t610/630

i have DIV !

bungle_uk · 10-26-2004, 08:48

Please man, don't be lazy. Just use the search button and you will find your answers, this has been discussed many many times before

DMD · 10-26-2004, 09:13

@ Crumarix1

RSA = Republic of South Africa

WBR D.

spectrum · 10-26-2004, 10:56

What is an RSA lock?
It is a cryptographic lock named after its inventors, Rivest, Shamir, and Adleman.
Just like DES - another encryption algorithm
Pls dont ask me what is DES ... find out

Crumarix1 · 10-26-2004, 12:54

OK,thanks. For my informations is enought.i thinked (WOW my english) is some network part of protocol in phone...

Bi0H4z4rD · 10-27-2004, 10:30

RSA= Really Stupid Answer

Its what you get when you ask sw to bypass it, or when you ask stupid questions (but questions not on SE phones).

BR

GeeZuZz · 10-27-2004, 14:46

Serious: RSA is a software-protection Sony-Ericsson implanted in their latest firmware to prevent unofficial software (like DIVlpt) being able to modify the software in the phone. In other words, RSA prevented it being possible to flash, or reset locks etc.

Crumarix1 · 10-27-2004, 15:34

in other way SE try to s**** divlpt,but div lptv5 s****ed sony e again!!!

s1emens · 11-17-2004, 08:06

RSA=Restricted Security Area. New SA protected by Sony Ericsson for their new firmwares. I guess???

s1emens

SFlood · 11-17-2004, 08:19

RSA - assymetric cryptographics algorithm (invented by Rivest, Shamir, and Adleman - RSA).
RSA uses different keys for ciphering and deciphering, so its easy to restrict crypto work to only one direction.
Here in SE phones (and in Siemens too) it enables multilevel protection mechanism - you easily can flash RSA-signed content into phone without passing authorisation but putting any un-signed (untrusted) content either disabled at all (for firmware area) or restricted by authorisation (for FS / GDFS areas).
In other words with use of RSA phome manufacturer enables everyone else (service center, end user, etc) to flash original, manufacturer approved content into the phone without passing any authorisations.
For AVR phones enabling RSA disables old boot authorisation algorithm to make RSA more secure, but it was incorrectly implemented and now can be easily removed.
For newest ARM phones RSA looks like to be the only one method of bootloading, so any removing of RSA cert. in the flashes only improves protection

10-26-2004, 07:55	#1 (permalink)
Crumarix1 No Life Poster Join Date: Sep 2004 Location: in AXE control room Age: 43 Posts: 774 Member: 84300 Status: Offline Thanks: 81 Thanked 42 Times in 36 Posts	What is RSA ? Yes, mybe is not wery smart question,but What is the RSA in se phones. for what is use and why is so important? and how i can change or put som more games in t610/630 i have DIV !

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10-26-2004, 08:48	#2 (permalink)
bungle_uk No Life Poster Join Date: Jan 2004 Age: 42 Posts: 4,940 Member: 51154 Status: Offline Thanks: 5 Thanked 59 Times in 37 Posts	Please man, don't be lazy. Just use the search button and you will find your answers, this has been discussed many many times before

10-26-2004, 09:13	#3 (permalink)
DMD No Life Poster Join Date: Jun 2002 Location: CTSA Age: 35 Posts: 2,200 Member: 12660 Status: Offline Thanks: 4 Thanked 7 Times in 7 Posts	@ Crumarix1 RSA = Republic of South Africa WBR D.

10-26-2004, 10:56	#4 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,132 Member: 17330 Status: Offline Thanks: 0 Thanked 9 Times in 7 Posts	What is an RSA lock? It is a cryptographic lock named after its inventors, Rivest, Shamir, and Adleman. Just like DES - another encryption algorithm Pls dont ask me what is DES ... find out

10-26-2004, 12:54	#5 (permalink)
Crumarix1 No Life Poster Join Date: Sep 2004 Location: in AXE control room Age: 43 Posts: 774 Member: 84300 Status: Offline Thanks: 81 Thanked 42 Times in 36 Posts	OK,thanks. For my informations is enought.i thinked (WOW my english) is some network part of protocol in phone...

10-27-2004, 10:30	#6 (permalink)
Bi0H4z4rD No Life Poster Join Date: Feb 2004 Location: Inside XMOS XDK Age: 29 Posts: 1,569 Member: 52560 Status: Offline Thanks: 38 Thanked 211 Times in 120 Posts	RSA= Really Stupid Answer Its what you get when you ask sw to bypass it, or when you ask stupid questions (but questions not on SE phones). BR

10-27-2004, 14:46	#7 (permalink)
GeeZuZz Freak Poster Join Date: Jun 2002 Posts: 284 Member: 13034 Status: Offline Thanks: 0 Thanked 1 Time in 1 Post	Serious: RSA is a software-protection Sony-Ericsson implanted in their latest firmware to prevent unofficial software (like DIVlpt) being able to modify the software in the phone. In other words, RSA prevented it being possible to flash, or reset locks etc.

10-27-2004, 15:34	#8 (permalink)
Crumarix1 No Life Poster Join Date: Sep 2004 Location: in AXE control room Age: 43 Posts: 774 Member: 84300 Status: Offline Thanks: 81 Thanked 42 Times in 36 Posts	in other way SE try to s** divlpt,but div lptv5 s**ed sony e again!!!

11-17-2004, 08:06	#9 (permalink)
s1emens No Life Poster Join Date: Oct 2003 Age: 33 Posts: 1,138 Member: 40602 Status: Online Thanks: 94 Thanked 95 Times in 62 Posts	RSA=Restricted Security Area. New SA protected by Sony Ericsson for their new firmwares. I guess??? s1emens

11-17-2004, 08:19	#10 (permalink)
SFlood No Life Poster Join Date: May 1999 Location: RU Posts: 911 Member: 83 Status: Offline Thanks: 0 Thanked 1 Time in 1 Post	RSA - assymetric cryptographics algorithm (invented by Rivest, Shamir, and Adleman - RSA). RSA uses different keys for ciphering and deciphering, so its easy to restrict crypto work to only one direction. Here in SE phones (and in Siemens too) it enables multilevel protection mechanism - you easily can flash RSA-signed content into phone without passing authorisation but putting any un-signed (untrusted) content either disabled at all (for firmware area) or restricted by authorisation (for FS / GDFS areas). In other words with use of RSA phome manufacturer enables everyone else (service center, end user, etc) to flash original, manufacturer approved content into the phone without passing any authorisations. For AVR phones enabling RSA disables old boot authorisation algorithm to make RSA more secure, but it was incorrectly implemented and now can be easily removed. For newest ARM phones RSA looks like to be the only one method of bootloading, so any removing of RSA cert. in the flashes only improves protection