simple encryption technique used in the computer?
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Encryption Algorithms\n\nDifferent encryption algorithms use proprietory methods of generating these keys and are therefore useful for different applications. Here are some nitty gritty details about some of these encryption algorithms. Strong encyrption is often discerend by the key length used by the algorithm.\n\nRSA\nIn 1977, shortly after the idea of a public key system was proposed, three mathematicians, Ron Rivest, Adi Shamir and Len Adleman gave a concrete example of how such a method could be implemented. To honour them, the method was referred to as the RSA Scheme. The system uses a private and a public key. To start two large prime numbers are selected and then multiplied together; n=p*q.\n\nIf we let f(n) = (p-1) (q-1), and e>1 such that GCD(e, f(n))=1. Here e will have a fairly large probability of being co-prime to f(n), if n is large enough and e will be part of the encryption key. If we solve the Linear Diophantine equation; ed congruent 1 (mod f(n)), for d. The pair of integers (e, n) are the public key and (d, n) form the private key. Encryption of M can be accomplished by the following expression; Me = qn + C where 0<= C < n. Decryption would be the inverse of the encryption and could be expressed as; Cd congruent R (mod n) where 0<= R < n. RSA is the most popular method for public key encryption and digital signatures today.\n\nDES/3DES\nThe Data Encryption Standard (DES) was developed and endorsed by the U.S. government in 1977 as an official standard and forms the basis not only for the Automatic Teller Machines (ATM) PIN authentication but a variant is also utilized in UNIX password encryption. DES is a block cipher with 64-bit block size that uses 56-bit keys. Due to recent advances in computer technology, some experts no longer consider DES secure against all attacks; since then Triple-DES (3DES) has emerged as a stronger method. Using standard DES encryption, Triple-DES encrypts data three times and uses a different key for at least one of the three passes giving it a cumulative key size of 112-168 bits.\n\nBLOWFISH\nBlowfish is a symmetric block cipher just like DES or IDEA. It takes a variable-length key, from 32 to 448 bits, making it ideal for both domestic and exportable use. Bruce Schneier designed Blowfish in 1993 as a fast, free alternative to the then existing encryption algorithms. Since then Blowfish has been analyzed considerably, and is gaining acceptance as a strong encryption algorithm.\n\nIDEA\nInternational Data Encryption Algorithm (IDEA) is an algorithm that was developed by Dr. X. Lai and Prof. J. Massey in Switzerland in the early 1990s to replace the DES standard. It uses the same key for encryption and decryption, like DES operating on 8 bytes at a time. Unlike DES though it uses a 128 bit key. This key length makes it impossible to break by simply trying every key, and no other means of attack is known. It is a fast algorighm, and has also been implemented in hardware chipsets, making it even faster.\n\nSEAL\nRogaway and Coppersmith designed the Software-optimized Encryption Algorithm (SEAL) in 1993. It is a Stream-Cipher, i.e., data to be encrypted is continuously encrypted. Stream Ciphers are much faster than block ciphers (Blowfish, IDEA, DES) but have a longer initialization phase during which a large set of tables is done using the Secure Hash Algorithm. SEAL uses a 160 bit key for encryption and is considered very safe.\n\nRC4\nRC4 is a cipher invented by Ron Rivest, co-inventor of the RSA Scheme. It is used in a number of commercial systems like Lotus Notes and Netscape. It is a cipher with a key size of up to 2048 bits (256 bytes), which on the brief examination given it over the past year or so seems to be a relatively fast and strong cypher. It creates a stream of random bytes and 'XORing' those bytes with the text. It is useful in situations in which a new key can be chosen for each message.
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I would use the shareware program winrar.  www.winrar.com.  You can put all of the files you want private in a single file container, and encrypt it with a password.  Good luck!
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go get truecrypt and use it http://www.truecrypt.org/\nit's free
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There is not an effective way to hide things. \nEncrypt them. (pgp, gpg)
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Try these sites buddy:\nwww.secureaction.com/encryption_free\nwww.reflex-magnetics.co.uk/products/datavault/page5\ngood luck!!!!
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do not hack a computer and you will not have to ask......
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create a password that nobody knows. that is all i can think of
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Read this:\nhttp://askcomputerexpert.ws43.com/security/
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A keylogger should do the job.\n\nThere are software or hardware types.
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how easy is your password to guess?
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If you don't care whether the file is visible or not and just want to prevent others from accessing its contents, the best solution is to encrypt it. Do *not* use ZIP archives, because the cipher they use is weak and can be broken.\n\nIf the file resides on an NTFS file system, the easiest way to encrypt it is to use the built-in encryption capabilities of Windows. To determine whether the file resides on an NTFS files system, do the following:\n\n1) In Explorer, right-click on the drive on which the file resides and select Properties from the menu that pops up.\n\n2) On the General tab of the dialog that will be displayed, find the "File system" label (it's just beneath the "Type" label). If the file system is "NTFS", you have what is needed. If it is "FAT32" (or "FAT") or something else, then you'll need a different solution; more about it later.\n\nNote that only Windows NT, Windows 2000 and Windows XP support NTFS file systems; Windows 95 and Windows 98 do not. (Although just because you are using a version of Windows that supports NTFS does not necessarily mean that this is the file system of the disk where the file is; you still need to check using the above method.)\n\nIf you have determined that the disk on which the file you want to protect is uses the NTFS file system, you can protect the file using the following procedure:\n\n1) Right-click on the file in Explorer.\n\n2) Select Properties from the menu that pops up.\n\n3) On the General tab of the dialog that appears, click on the Advanced button.\n\n4) A new dialog will appear. Check the checkbox marked "Encrypt the contents to secure data".\n\n5) Click the OK buttons to close the dialogs.\n\nIf the disk on which the file resides does not use the NTFS file system, you'll need third-party encryption software.  Be aware that most crypto programs written by amateurs (and even most crypto programs sold by software companies) are weak and easily broken by a determined attacker. It is best to stick with programs which are available in source and have been inspected for vulnerabilites for years. One such program is PGP. Although designed mainly for message encryption using public key cryptography, it can be used to encrypt files using conventional cryptography too. However, if you have more than one file you want to protect, it is better to create a whole encrypted volume (like a disk partition), on which to store these files. PGPDisk is ideal for that, although TrueCrypt is reasonably good too.
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The incredible growth of the Internet has excited businesses and consumers alike with its promise of changing the way we live and work. But a major concern has been just how secure the Internet is, especially when you're sending sensitive information through it. \nLet's face it, there's a whole lot of information that we don't want other people to see, such as: \n\nCredit-card information \nSocial Security numbers \nPrivate correspondence \nPersonal details \nSensitive company information \nBank-account information \n\nE-commerce relies on the ability to send information securely.\n \nInformation security is provided on computers and over the Internet by a variety of methods. A simple but straightforward security method is to only keep sensitive information on removable storage media like floppy disks. But the most popular forms of security all rely on encryption, the process of encoding information in such a way that only the person (or computer) with the key can decode it. \n\nIf you want to learn more about encryption, check out the rest of this article from the first site below:
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i wonder why there are no answers to this question. maybe its difficult to find a direct answer online. i will tell you whatever i have learnt and understood through my information security classes so far.\n\nbasically data is decrypted over the internet depending on the technology used.\n\nData is transported over the network in packets.\n\nSome data are completely plaintext; e.g. ftp. This means that if you are on a wireless, and somebody is running a packet sniffer; he can look at your data by sniffing the packets.\n\nSome data are encrypted. There are many technologies - Private key encryption, Public key, Digital Signatures, SSL etc which can provide security at different layers of the network.\n\nNow todays network can be divided into 5 major layers - Application, Transport, Network, Data and Physical. keys and signatures help in encrypting data in Application layer. while technologies like IPSec, SSL and VPN  encrypt data over the transport and network layer. \n\nBasically in key and signature systems you need a corresponding key to decrypt the data. \n\nIn encryption at transport layer and network layer, there is no need of key as technologies like IPSec establish a secure tunnel between the host and destination computer, thus securing the data.\n\nInformation Security is a vast and nice topic. You can try to learn more by surfing - www.searchnetworking.com
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It looks incredible. I think what you are talking about is backing up of files using powerful encryption method. The one which has this power is the UltimateZip that I'm using. If you want you can verify it at the following website: www.ultimatezip.com
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try\n\nhttp://www.ciphersbyritter.com/LEARNING.HTM
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On a Mac you can use Filevault (system preferences) or you can create encrypted disk images with Disk Utility (Applications:Utilities) and store your sensitive data in them. \n\nYou're never really safe with Windows, but there are ways to lock folders. Try doing a web search for locking folders.
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There are many methods out there, most of them are expensive however.  The thing to keep in mind is that the data you put on a CD is meant to be read, and there will always be some enterprising hacker with nothing but time on his hands to figure out how to get that data off and do something else with it.\n\nThe only good way of reliably protecting that data is encrypting it, but keep in mind it will be useless to you as well, until it is decrypted, which makes it sort of pointless for most applications.\n\nIf this is software you are trying to protect, there are licensing schemes available.  There are some for media schemes as well, although it would take a bit of effort to set that up.