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Thread: rc4

  1. #1
    Join Date
    Apr 2004
    Posts
    2

    rc4

    what is rc4 ?

  2. #2
    Join Date
    Jun 2001
    Posts
    398
    HI,

    Its a stream cipher.
    Read more at

    [url]http://www.ncat.edu/~grogans/algorithm_history_and_descriptio.htm[/url]

    Data.

  3. #3
    Join Date
    Apr 2004
    Posts
    2

    Re: rc4

    could someone explain rc4 or stream cipher in layman's terms ?
    thanx !
    Originally posted by zaq
    what is rc4 ?

  4. #4
    Join Date
    Jun 2001
    Posts
    398
    hi,

    A stream cipher encrypts an decrypts one bit ot byte at a time. The encryption and decryption are symmetric. RC4 is a stream cipher.

    The other types of ciphers are called block ciphers. The encrypt and decrypt one block at a time.

    usually block sizes are 64 bit and *28 bit to take advantage of *2 bit and 64 bit microprocessors.This is one of the reasons.

    pls look at the rsa faq below

    [url]http://www.rsasecurity.com/rsalabs/faq/2-*-5.html[/url]

    hope this helps.

    Regards,
    Data.

  5. #5
    JUST A MAN Guest

    Exclamation DAMN IT - I NEED REALLY HELP

    Hey my name is Nick.I have same problem as you man!My PC was under hackers attack too much times - especially by viruses.ALL MY IMPORTANT DOCUMENTS WAS STOLEN - I MEAN COPY OF ALL MY IMPORTANT DOCUMENTS WAS STOLEN.AND TODAY SOMEONE WRITE FROM MY CHATNAME IN GERMAN CHAT STRANGE THINGS - SUCH AS "I HATE JEWS" AND SOMETHING LIKE THIS.I AM JEW - AND I WAS REALLY SUPRISED HOW IT CAN POSSIBLE TO WRITE FROM MY NICKNAME STUPID THINGS - I EVEN DIDN'T SAW HOW WAS THE TEXT TYPED IN TEXT FORM!THERE WAS NOTHING - ONLY JUST WORDS FROM MY NAME!THE ADRESS OF THIS CHAT IS [url]http://www.anarchie.de[/url]
    I JUST WAS AT THIS CHAT SOMETIMES - SOMETIMES THERE ARE REALLY NORMAL PEOPLES WITH WHICH YOU CAN TALK ABOUT ANYTHING.BUT TODAY WAS SOMETHING STUPID - MAYBE IT WAS SECURITY SERVICE OS UKRAINE [url]http://www.ssu.gov.ua[/url] or MAYBE THAT WAS HACKERS FROM ISP FARLEP
    [url]http://www.dn.farlep.net[/url] OR MAYBE IT WAS HACKERS FROM USA,EUROPE,JAPAN - EVEN MAYBE THAT WAS GUYS FROM FBI [url]http://www.fbi.gov[/url] or from PENTAGON [url]http://www.pentagon.mil[/url]
    I DON'T KNOW WHO WAS TYPING FROM MY NAME IN THE CHAT ROOM OF THE [url]http://www.anarchie.de[/url] website - BUT ONE THING I KNOW EXACTLY SUCH INCIDENTS MUST BE STOPED,DISCRIMINATION MUST BE STOPED!AND ADMINISTRATORS OF THIS WEBSITE SHOULD CARE MUCH ABOUT HACKERS AND FREEDOM OF WORD - THEY MUST HAVE RULES OF CHAT SYSTEM AND KICK WHO BRAKE THIS RULES!PLEASE I TALK TO ANYONE WHO CAN HELP ME - LETS STOP THIS FUCKING DISCRIMINATIVE SHIT CHAT!
    THE ADRESSES OF ADMINISTRATORS OF ANARCHIE.DE WEBSITE ARE:
    inetnum: 62.245.*68.64 - 62.245.*68.*5
    netname: EDVBERATUNG-NET
    descr: EDV Beratung Huber
    country: DE
    admin-c: BH***-RIPE
    tech-c: BH***-RIPE
    status: ASSIGNED PA
    mnt-by: MNET-MNT
    changed: [email]markart@m-net.de[/email] 20020*07
    source: RIPE

    route: 62.245.*28.0/*7
    descr: M"net Telekommunikations GmbH
    descr: Germany
    origin: AS8767
    mnt-by: MNET-MNT
    changed: [email]vierke@m-net.de[/email] 20020828
    source: RIPE

    person: Benedikt Huber
    address: EDV Beratung Huber
    address: Franz-Josef-Str. *0
    address: 8080* Muenchen
    address: Germany
    phone: +4* 8* **0 7*6 7*
    fax-no: +4* 8* *40 *8* 0*4
    e-mail: [email]bhuber@bhuber.de[/email]
    nic-hdl: BH***-RIPE
    mnt-by: MNET-MNT
    changed: [email]markart@m-net.de[/email] 20020*07
    source: RIPE

    inetnum: 62.245.*68.64 - 62.245.*68.*5
    netname: EDVBERATUNG-NET
    descr: EDV Beratung Huber
    country: DE
    admin-c: BH***-RIPE
    tech-c: BH***-RIPE
    status: ASSIGNED PA
    mnt-by: MNET-MNT
    changed: 20020*07
    source: RIPE

    route: 62.245.*28.0/*7
    descr: M"net Telekommunikations GmbH
    descr: Germany
    origin: AS8767
    mnt-by: MNET-MNT
    changed: 20020828
    source: RIPE

    person: Benedikt Huber
    address: EDV Beratung Huber
    address: Franz-Josef-Str. *0
    address: 8080* Muenchen
    address: Germany
    phone: +4* 8* **0 7*6 7*
    fax-no: +4* 8* *40 *8* 0*4
    e-mail:
    nic-hdl: BH***-RIPE
    mnt-by: MNET-MNT
    changed: 20020*07
    source: RIPE




    answer section
    name type result
    68.*68.245.62.IN-ADDR.ARPA.
    PTR
    host-62-245-*68-68.********.m-online.net.


    authority section
    name type result
    *68.245.62.IN-ADDR.ARPA.
    NS
    ns*.m-online.net.

    *68.245.62.IN-ADDR.ARPA.
    NS
    ns2.m-online.net.


    additional section
    name type result
    ns2.m-online.net.
    A
    8.*.*8.2*2.IN-ADDR.ARP

  6. #6
    Unregistered Guest

    Exclamation Re: DAMN IT - I NEED REALLY HELP

    hey nick, seems to me you took too many of those pills your doctor gave you.

  7. #7
    Join Date
    Jun 2001
    Posts
    398
    Hi,

    please only post once and under the appropriate section. A simple solution is to get a second hard disk and plug out the cable when you browse the internet(i.e to prevent your data from being erased or altered). If you are only worried about other people reading your information, you can use encryption products like pgp or digisecret. Invite your friends to some other chat. There are lots of chatservers out there.

    Data.

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