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Lesson 8 Protecting yourself Online

• SPAM avoiding o Avoid adding yourself to unwanted mailing lists o Conduct online transactions through secure Web sites o Do not assume that only the intended recipient will read your messages o Be selective when posting information to newsgroups
• Cookie types: o persistent o session o first-party o third-party o You can control when and from whom cookies are accepted by specifying the level of privacy you want to maintain o You can view the file content of cookies to see information about the Web site
• You can configure your browser’s security settings to accept, reject or prompt before accepting: o ActiveX controls o JavaScript
• Authentication – the process of verifying the identity of a user who logs on to a system, or the integrity of transmitted data
 Anonymous logon – no user name or password are required, and authentication is handled transparently by the browser and server
 Basic authentication – a user name and password are required, and that information is sent as plain text
 Symmetric (private-key) encryption – The same key is used to encrypt and decrypt messages
 Asymmetric (public-key) encryption – Two keys are used to encrypt and decrypt messages: a public key and a private key
 Hash (one-way) encryption – Uses hashes to verify the integrity of transmitted messages
 Digital certificates – you must have the proper digital certificate to gain access  User names and passwords – used to log on to private and public networks, including the Internet
 Digital signatures – electronic signatures that verify the identity of the message sender
 Non-repudiation – digital signatures prove that a transaction or transmission took place; neither the sender nor the receiver can later deny the action
• Encryption – the process of converting data into an unreadable form of text
• Decryption the process of converting the encrypted data back to its original form
• Key a mathematical algorithm
• Secure Sockets Layer (SSL) – a protocol for secure exchanges
• Various protocols in the TCP/IP suite can be made secure by running them over SSL/TLS, including: o HTTPS o S/FTP o IMAPS o POP3S
o Virus – damages computers and networks, often alters files to damage or destroy data
o Worm – resides in active memory and replicates itself until an entire disk is full
o Trojan – appears to be harmless (such as a computer game) but produces harmful results o Illicit server – installs hidden services on systems
 Client code – allows remote access to a computer by an attacker
 Server code – infects destination computer and enables the attacker to control it
• Corporate IT departments are often the first line of defense against viruses o Common ways to contract viruses:  Receive infected disc/drive from colleague or friend  Download infected file  Download illicit server attachment
• Common ways to protect against viruses: o Do not open e-mail or attachments from unknown senders o Configure browser and e-mail security to highest levels o Use anti-virus software o Keep anti-virus software current o Stay informed about the latest virus threats o Make backup copies o
• If you receive an attachment you do not recognize: o Do not open the attachment o Contact the sender to determine whether the attachment is legitimate o If you cannot contact the sender, delete the attachment from the message o Delete the attachment from the Deleted Items folder
• If you suspect a virus attack: o Use anti-virus software to remove the virus o If you cannot launch anti-virus software, reboot from a known clean system disk, then launch the anti-virus software o Remove virus from all disks, files and programs o If damage is too extensive, refo
• Spyware – an application secretly placed on a user’s system to covertly gather information and relay it to outside parties, usually for advertising purposes
o Cookies are not spyware because:  The user is aware of their presence  The user has the option to disable outside access to cookie information  Use spyware detection applications to detect and eliminate spyware
• Update – a software upgrade that permanently fixes known bugs and improves software performance
• Patch – a temporary bug fix
• Virus update – files of virus signature profiles you use to keep your anti-virus software current
• Typosquatting – registering a domain name similar to a high-volume site hoping to receive traffic from users seeking the high-volume site who mistakenly enter an incorrect URL in the browser
• Firewall – a collection of hardware, software and corporate policies that prevents unauthorized access to or from private networks
o Use firewalls to:  Prevent unauthorized Internet users from accessing private networks  Retain control of proprietary information  Prevent unauthorized export of proprietary information  Firewalls may prevent access to external e-mail providers or external server
• Licensing o To license copyright-protected material, you must obtain permission from the author
• Trademarks o To register a trademark, you must contact the appropriate agency in your home country
Created by: spearaylall



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