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cas:systemas:biss [2017/04/25 08:01]
admin
cas:systemas:biss [2018/11/08 08:02]
Línea 1: Línea 1:
-BISS mode 1•  
-BISS mode 1 uses a 12 digit hexadecimal key as session word. The session word has to be announced to all parties that are allowed to descramble the received data.• 
- ​Example : 123456ABCDEF• ​ 
-"BISS mode E• 
-The session word can easily be compromised,​ there is no protection when communicating it to the receive site. 
- 
-BISS mode E : scrambled with encrypted session word(ESW)• ​ 
-This mode uses the ID (identifier) of the receiver(s) and a session word to calculate an encrypted session word(16 digits hex)• There are two possible IDs - buried ID- injected ID•  
-By encrypting the session word there is an additional protection on the session word. The ESW can be communicated using a non-secure channel since in order to descramble the received signal both the ID and the ESW need to be known. 
- 
-Calculation of encrypted session word 
-1.Define a SW  
-2. Get the IDExchange ESWEnter ESW in IRD(s) 
-3.Calculate ESW To calculate the ESW  
-4. the DES algorithm is used 
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-http://​colibri.bplaced.net/​csa_rainbow_table.htm 
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-http://​www.dreamboxgate.com/​forum/​dream434932/​ 
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-http://​www.dreamboxgate.com/​forum/​dream445247/​ 
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-https://​www.facebook.com/​permalink.php?​story_fbid=225042280942028&​id=141651209265744 
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-http://​mower.orgfree.com/​downloads.php?​cat_id=1 
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-mody sat  
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-http://​www.sat-universe.com/​showthread.php?​t=294666 
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cas/systemas/biss.txt · Última modificación: 2018/11/08 08:02 (editor externo)