Re: Question about DES-CBC and Iinitialization Vector

Decrypt the 8 bytes of ciphertext and xor the result with the data?

JR

muCtvp/fr/lo


<jorge.ventura@xxxxxxxxxxxx> ???
??????:1180473261.418320.161720@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I have a question about DES-CBC.

I have an encrypted 8 bytes with a key that I have created and given
to an encryption box. The box use that key to encrypt the data (I know
the data in advance) using DES-CBC and an unknown Initialization
Vector.

It's possible with the previous knowledge of the KEY and the DATA,
determine the Initialization Vector ???


Thanks in advance,
Jorge Ventura



.

Relevant Pages

  • Re: OpenOffice encryption insecure? (repost)
    ... >> (The cited message presumably doesn't accurately reflect the ... Package Format; 11.3 Encryption): ... initialization vector and 16-byte salte for each file. ... Daniel Vogelheim ...
    (sci.crypt)
  • Re: Should Initialization Vectors be public ?
    ... The purpose of Initialization Vector is to allow encryption algorithm ... but let's say that you want to decrypt values from the record ... add them at the beginning of your plaintext data before ...
    (microsoft.public.dotnet.security)
  • Re: Should Initialization Vectors be public ?
    ... > The purpose of Initialization Vector is to allow encryption algorithm ... Actually, as a point of clarification, IV is used for feedback purposes. ... used to achieve the cipher text. ... during the encryption process. ...
    (microsoft.public.dotnet.security)
  • Re: SQL 2005 - Searching Encrypted SSN
    ... initialization vector. ... you lose SQL Server's ability to ... Do you think that it is possible to do the following when the encryption ... If you only need the SSN for ...
    (microsoft.public.sqlserver.security)
  • Re: Question about DES-CBC and Iinitialization Vector
    ... to an encryption box. ... the data in advance) using DES-CBC and an unknown Initialization ... determine the Initialization Vector ??? ... c=enc(key, (p XOR iv)) ...
    (sci.crypt)