what are the two general approaches to attacking a cipher?
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There are two general approaches to attack a conventional encryption scheme: Cryptanalysis and Brute Force attack. Cryptanalysis can be described as the process of attempting to recover the plaintext and/or key from a ciphertext.
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['In Windows Explorer, right-click on the file or folder you wish to encrypt.', 'From the context-menu, select Properties.', 'Click on the Advanced button at the bottom of the dialogue box.', 'In the Advanced Attributes dialogue box, under Compress or Encrypt Attributes, check Encrypt contents to secure data.', 'Click OK.']
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['Step 1: RECONNAISSANCE. Harvesting email addresses, conference information, etc. ... ', 'Step 2: WEAPONIZATION. Coupling exploit with backdoor into deliverable payload. ... ', 'Step 3: DELIVERY. ... ', 'Step 4: EXPLOITATION. ... ', 'Step 5: INSTALLATION. ... ', 'Step 6: COMMAND AND CONTROL. ... ', 'Step 7: Actions on Objectives.']
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2.3 What are the two principal requirements for the secure use of symmetric encryption ? + A strong encryption algorithm. The opponent should be unable to decrypt ciphertext or discover the key even if he or she is in possession of a number of ciphertexts together with the plaintext that produced each ciphertext .
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['Example: Input data is the byte 0xC2 = b11000010. ... ', 'Example verification: ... ', 'CRC-8 Shift Register Example: Input data = 0xC2 = b11000010 (with 8 zero bits appended: b1100001000000000), Polynomial = b100011101.']
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Attack once, pause, then just spam attack away and you should do million stab.
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['In message that you are composing, click File > Properties.', 'Click Security Settings, and then select the Encrypt message contents and attachments check box.', 'Compose your message, and then click Send.']
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Yes the attack. And sometimes the attacks come from down in the tunnels. What I've done is simply wall up the tunnels and place turrets on the inside facing down the tunnels.
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Security researchers have successfully broken one of the most secure encryption algorithms, 4096-bit RSA, by listening — yes, with a microphone — to a computer as it decrypts some encrypted data. The attack is fairly simple and can be carried out with rudimentary hardware.
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XOR allows you to easily encrypt and decrypt a string, the other logic operations don't. Here's a wikipedia link on the XOR cipher. I can see 2 reasons: 1) (Main reason) XOR does not leak information about the original plaintext.
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['Use at least 6 characters.', 'Use a combination of uppercase and lowercase letters.', 'Include at least one number within the password.', 'Do not use a name, a word that could be found in the dictionary, or a series of letters as it appears on the keyboard ("qwerty" and "12345" are not secure passwords)']
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['Pattern questions.', 'Loop based questions.', 'Removal of vowel from string.', 'GCD programs.', 'Print and count all the numbers which are less than a given key element from a given array.', 'Find prime numbers upto n numbers.', 'Eliminate repeated letters in Array.', 'String reversal.']
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['⌘ is the Command (\uf8ff) key.', '⌃ is the Control key.', '⌥ is the Option (alt) key.', '⇧ is the Shift key.', '⇪ is the Caps Lock key.', "fn is the Function key. Now you know, but if the symbols confuse you, don't feel too bad about it."]
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["Baiting. As its name implies, baiting attacks use a false promise to pique a victim's greed or curiosity. ... ", 'Scareware. Scareware involves victims being bombarded with false alarms and fictitious threats. ... ', 'Pretexting. ... ', 'Phishing. ... ', 'Spear phishing.']
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Types of Email Attack The most common techniques used to attack emails include identity theft, phishing, virus and spam emails. Let us take a closer look into the common techniques that threaten email security.
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WPA2 uses the Counter Mode with Cipher Block Chaining Message Authentication Code Protocol (CCMP) protocol, based on the Advanced Encryption Standard (AES) algorithm for authentication and data encryption. ... The PTK is then used to encrypt and decrypt messages.
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The basic difference between these two types of encryption is that symmetric encryption uses one key for both encryption and decryption, and the asymmetric encryption uses public key for encryption and a private key for decryption.