On This Page. An Overview of the Encrypting File System What EFS Is Basic Howtos Planning for and Recovering Encrypted Files Recovery Policy How EFS Works. File2_en.png' alt='What Does Encrypted File Mean' title='What Does Encrypted File Mean' />What does encryption mean East Tec. Turn your sensitive information into unintelligible data with east tec Invisible. Secrets and east tec Safe. Bit so that unauthorized parties cant exploit it. Definition. In its original form encryption was first used by the ancient Egyptians, Mayans, then the Greeks and Romans in wartime and politics. They used it as a security practice to encode messages that can deceive the enemy. In its modern day application it is basically the method of turning plaintext information into unintelligible format cipher, using different algorithms. This way, even if unauthorized parties manage to access the encrypted data, all they find is nothing but streams of unintelligent, alphanumerical characters. What is encryption used forHello I just added an email account to my outlook but had some difficulty receiving the same message Outlook Auto Account Setup Encrypted Connection not available. Turn your sensitive information into unintelligible data with easttec InvisibleSecrets and easttec SafeBit so that unauthorized parties cant exploit it. NTP Softwares solutions for file data storage reduces cost and improves efficiency. Request an evaluation to improve file tiering and file archiving. Encryption has widely been used to protect data in numerous areas, such as e commerce, online banking, cloud storage, online communication and so forth. How does an encrypted message may look like A simple example of a cipher can be, for instance, the replacing of the letters in a message with the ones one forward in the alphabet. So if your original message read Meet you at the cafe tonight the encrypted message reads as follows Nffu zpv bu uif dbgf upojhiuWhat is the encryption algorithm The encryption algorithm is the chain of calculations that determine what ways the input plain text will be transformed into the output ciphertext. In the simple example above there was only one calculation carried out, which moved each letter of the message one forward in the alphabet. Of course, advanced encryption software programs can generate extremely complicated algorithms to achieve complex ciphers. Encryption algorithms fall into two basic categories symmetric, or asymmetric key algorithms. You can find their description further below. The role of the encryption key passwordTo control the algorithm and the process of encryptiondecryption, a key password is used. It is basically either a random binary key or a passphrase. It determines the exact pattern the algorithm uses to turn plaintext into ciphertext. To guarantee the secrecy of the key plays crucial role in protecting the privacy of the message because the key may initiate the process of encryption, decryption, or both. If a hacker manages to obtain the key, just by itself, even the most complex algorithm will fail to prevent the encrypted data from being decrypted, because algorithms are publicly known. So if the password is cracked by a hacker, he can use it to decrypt the encrypted confidential data with it. In order to reduce chances of the key getting hacked, it is highly recommended to create one which is a combination of letters, numbers and special characters, so is to frequently change the key. The key also has to have a particular size so that it can be considered safe. Using a virtual keyboard when entering the password is a must to protect it against keylogger malware that might be present on the PC. There are two fundamental ways of secure communication based on encryption algorithms and the significance of the key in both are explained right below. Symmetric key algorithms and communication based on them. Algorithms in this category use the same key for encrypting plaintext and decrypting ciphertext. The preparation for symmetric key based communication is as follows The sender and the receiver need to securely exchange a secret key password prior to sending messages for instance, in a private meeting, or via a phone call, and agree that the same key will be used for protecting all messages between them afterwards. Using symmetric key algorithms makes it easy for both parties to maintain secure communication once the secret key got exchanged in the beginning, because, unlike in the case of asymmetric algorithms, parties do not need to verify each time a communication is about to take place that it was indeed them who sent a message using a particular key. Symmetric key algorithms are also faster, consume less computer resources that asymmetric ones do and can handle large amount of data thats why they are used for general encryption. One of the disadvantages of this method is that if unauthorized parties manage to obtain the key from either the sender or the receiver, either during the time when it is being exchanged, or afterwards, they can easily decrypt any message sent between the original parties. Another noteworthy downside is the difficulty of maintaining and managing separate keys for each partner one communicates with. Our encryption suite, east tec Invisible. Secrets, offers solutions for both problems. Its Secure Password Transfer feature guarantees protected password exchange between two computers and its Password Manager makes it easy to handle multiple passwords safely. Asymmetric key algorithms and their usage. As opposed to symmetric key algorithms, asymmetric key algorithms use a key pair two randomly generated numeric strings to control the encryption of plaintext and the decryption of ciphertext. The key used for encryption is a public key, that is, the sender can encrypt a message with a key that was not secretly shared with the receiver in advance, but is available in specific directories for anyone to use. The other key of the pair, the private or secret key, is generated by complex mathematical processes and is linked to its public key pair. In other words, if a message, or file was encrypted with a public key, only its private key pair can decrypt it. One of the inherent advantages of using asymmetric key algorithms for secure communication is that the sender and receiver do not need to exchange a secret key prior to sending secret messages, this way greatly decreasing the risk of the key getting hacked. This type of communication also allows the use of digital signatures which makes it easy to detect if a message got accessed in transit by unauthorized parties, because a digitally signed message can only be modified if the signature was first invalidated. Downside issues include the necessity of public key authentication each time a message is to be sent then there is the scenario of private key loss, when decryption of the encrypted message becomes impossible. Asymmetric algorithms are much slower and resource consuming than symmetric ones so they arent well suited for general communication purposes that involve computing large amounts of data. However, they offer a great way to protect small amount of data, such as the key password which needs to be securely exchanged. Most encryption software programs employ both symmetric and asymmetric algorithms where symmetric ones handle the bulk of the message and asymmetric ones protect the key. The Advanced Encryption Standard AESThe fast progress computing saw in the last two decades made it necessary for governments to set improved encryption standards that are able to provide secure protection against advanced hacking techniques. The present day top security standard, set by the U. S. National Institute of Standards And Technology, is the Advanced Encryption Standard AES based on the Rijndael algorithm. Both east tec Invisible. Secrets and east tec Safe. Bit employ that method among others. More info on different algorithms further below. What does block size refer to The well known and most used algorithms we are going to list below which are also supported by our software products fall into the category of block cipher algorithms. Free. TDS Frequently Asked Questions. The Free. TDS User Guide. This list of frequently asked questions and answers about. Free. TDS is updated between releases to cover problems since the. General Questions. Documentation. Implementation. Programming C, Sybperl, SQSH, PHP. Problems Running General Questions. What is Free. TDS Free. TDS is a free implementation of the TDS Tabular Data. Stream protocol that is used by Sybase and Microsoft for their. It can communicate with any Sybase or Microsoft SQL. Server. It includes three client libraries DB Library, CT Library. ODBC. All libraries use the same protocol and can communicate with. Where do I get Free. TDS You can get the latest Free. TDS from. ftp. freetds. See Quick Links on the Free. TDS home page. See the. User Guide for details. Your favorite operating system may have a package of some kind. You might want to check there. Occasionally someone. Post a message. to the list if youre looking for one and dont find one in the. Does Free. TDS support Microsoft servers Yes. Microsoft servers dont usually accept TDS 5. Use one of versions 7. Guide for details. Does version X of Free. TDS connect to version Y of. Microsoft or Sybase serverFor the last several years, every version of Free. TDS has been. able to communicate with every kind of TDS server. New servers. sometimes introduce new protocol features, but the changes are small. Generally, you should use the latest version of the TDS protocol. See the User. Guide for details. How can I get help or support After reading this FAQ and the User Guide, you might want to. If. you dont see your question answered there or, if youd just. Free. TDS, please. Questions. new and old are cheerfully answered there. Traffic is not high. Netiquette note Its considered poor form to mail. Please direct your question. Who is responsible for Free. TDS Current contributors. Brian. Bruns. Started this crazy thing. James K. Lowden. Project maintainer since 2. Frediano Ziglio. Wrote great swaths of the ODBC driver and keeps the TDS. Also contributed. Project maintainer since 2. For a more complete history, see AUTHORS in the distribution. Thanks also go to the folks at A2i, Inc. DB Library host file bulk copy and writetext. Dave Poyourow there for helping with the. To send. email to anyone listed above, delete the nospam. Why LGPL license Brian Bruns started the project, and thats the choice he. LGPL was chosen because if you want a commercial client. Sybase, Microsoft or others. I do believe. BSDish licenses are better in some cases, but not for something. Documentation. What sort of documentation is available The Free. TDS User Guide. Free. TDS, on Reference Manual is a. APIs and. the TDS layer. What about a Programmers Reference Manual The best information is available from the vendors. Free. TDS. means to conform to the documented and, in some cases. Is there any documentation on the TDS protocol There is preliminary. The most up to date version is in. User Guide. Sybase publishes its TDS 5. Functional Specification. Microsoft published its specification, too. It can currently be found on MSDN or search the web for. MS TDS tabular data stream site microsoft. Implementation. Many programs look for the SYBASE environment. You will want to. Free. TDS directory. For example, if. Free. TDS is installed in usrlocalfreetds. SYBASE. variable would be set to usrlocalfreetds. Programming C, Sybperl, SQSH, PHPHow do I compile Sybperl with Free. TDS How do I compile SQSH with Free. TDS How do I compile PHP with Free. TDS Please refer to the User Guide. How should I choose among DB Library, CT Library. ODBC Free. TDS offers three client libraries and one. We generally encourage people to. In choosing. which client API to write to, you might want to peruse our. Where is libtds. so Any reference to. Any test for its existence. As of version 0. 8. TDS utility library is not built. The static library libtds. CT Library, DB Library, or ODBC. Because libtds is statically linked to the client libraries. TDS functionality they need. In the past, libtds was distributed as a shared object. We found that did more harm than good. Proper versioning and support was a burden on the. Only programs that used more than. Such programs are rare, and the benefit small. Of course, its still free software, and youre free to build a. Its just not done out of the box. Which Perl library should I use There are four options for using TDS and Perl to connect to a. Sybase or Microsoft database, DBD Sybase, DBD ODBC. DBD Free. TDS. and Sybperl. As of 2. 01. 0, DBD Sybase and DBD ODBC are your best choices. If. you need paramaterized queries on a Microsoft server, use DBD ODBCAre there any known issues ODBC can be confusing to set up. See the samples. directory for example. User. Guides instructions carefully. BCP does not support TDS 4. You must use a more modern. Adobe After Effects Cs2 on this page. DBD Sybase dynamic SQL placeholders dont work, pending a client side SQL parser. The ODBC ones do. There are no plans to implement DB Library browse mode. Errors can sometimes be confusing. When an application uses. BCP, the message returned by Free. TDS can. sometimes be misleading. In the latter case, its often necessary. What features are missing compared to the vendors implementations In no particular order DB Library browse APIParameterized queries in CT Library with TDS 7. Microsoft serversCT Library money functions. For specific functions, consult docapistatus. Very few programs actually need the missing functionality. Parameterized CT Library queries would benefit Perl DBD Sybase users, but the functionality would require departing from Sybases documented API. Why does each connection support only one query at a time If you are accustomed to programming with other database. TDS protocol. When a TDS serverbe it by. Microsoft or Sybaseresponds to a query, it may send a result. The server sends the rows as theyre. The client. libraries make the rows available to the client application. The client library is tightly coupled to the server they are. The server requires the. Until one of those two things happens, the server. It will complain. How do mortal programmers cope with this strict. For one thing, they become better. The solution often involves doing more SQL work, which. Even when thats not true, theres nothing to prevent the. Sometimes, the best answer is to open a new connection. Thats not as bad as it sounds, and it certainly not unheard of. Its important to realize that the selection of rows and. A TDS server issues its results a row at a. Its up to the applicationor a. But what about MARS you ask Doesnt that solve the problem Well, no. MARS does make a TDS server more similar to other vendors servers, and Microsoft benefits from one more just like the others feature for its ODBC driver. PHP note. If you use PHP, you will still run into this. The reason is that. PHP is so nice that it will re use the first connection if you. You my wish to refer to. Daniel Fazekas in the mailing list archives. Is Free. TDS thread safe Different threads may all use separate connections without. Threads may not share a DBPROCESS or. CSCONNECTION without controlling access via a mutex. Are there plans to implement the Open. Server protocollibrary Not at this point, there is still much work to do on the. But, libtdssrv will do the trick for. Problems Running. Output Parameters. Im not getting my output parameters returned, but I seem.