The oldest form of cryptography, dating back at least 2000 years, uses the same key for encryption and decryption. With symmetric key encryption, the sender and receiver of the message must each keep the same key or password as a secret in order to guarantee their privacy when they exchange encrypted messages.

Symmetric encryption uses a single piece of information (called a key) to perform the encryption-decryption processes. The sender would take the key (which is known by both parties) and encrypt the data by some process (this process is called the algorithm). The receiver, knowing the key and the algorithm, would take the message, reverse the process using the same key, and would get the original message.

We think yes, as you need to transfer the public key over a second communication line, like an USB-Stick or over email. So if no third party node is in the middle of both, the clocked packet and the key for that packet, no one can decrypt the packet without the key.

Before any information is uploaded into your CopySafe, it is automatically compressed and encrypted. You will have a password, also called an encryption key, for accessing your data. It is the only way to decrypt your files after retrieval. It is very important to notate this password/key and keep it in a safe place for future reference.

No, TrueCrypt never uses an output of a hash function (nor of a HMAC algorithm) directly as an encryption key. See the section Header Key Derivation, Salt, and Iteration Count in the documentation for more information.

The story begins: When Julius Caesar sent messages to his trusted acquaintances, he didn't trust the messengers. So he replaced every A by a D, every B by a E, and so on through the alphabet. Only someone who knew the ''shift by 3 rule could decipher his messages. A cryptosystem or cipher system is a method of disguising messages so that only certain people can see through the disguise. Cryptography is the art of creating and using cryptosystems.

Very Important. Without it, your backup data will remain encrypted and unreadable. All data that is selected for backup is encrypted before leaving your computer. We have no way at all of reading this information should you lose your encryption key.

If you need to change your password or encryption key, select either the Change Password or Change Encryption Key buttons from the application that is also supplied by Your-Data. Changing your encryption key involves intensive processing on our servers and may take several minutes. It should therefore not be done unless your encryption key was compromised.

To change your encryption key, select Options... from the Tools menu, select the Account and Security tab, and then click on Change encryption key in the Account Setup section. Enter your old key and choose a new key. Confirm the new key and click on OK. The server dialog box will appear and display the message "Key changed successfully". Note that you cannot cancel this process.

The message that you are receiving only appears if the encryption key that you're using differs from the one originally used in the previous backup set. What this means is that you cannot append to a backup set on a tape with different encryption keys. The option is this scenario is to overwrite the tape with each backup. Otherwise, you have to use the same encryption key. To alleviate this, change the login on the backup server to one with administrative privileges on the target machine.

Yes. A customer can change the password that that is used to access encrypted data. By doing this, all data will now be available with the new password (and NOT available with the old password). Additionally, the customer will not need to re-send their data. It is important, of course, to take proper precautions to ensure that terminated employees have their accounts terminated immediately and that passwords are changed after any security breach.

When a customer adds a server to the service, they are asked to create an encryption password. At this time, a unique 256-bit encryption key is generated by the agent software (random generation). This key is then encrypted using the encryption password. This newly encrypted key is then sent to LiveVault in escrow.

DigiVault, security is of utmost importance. Therefore, if you misplace your 'encryption key' we will be unable to restore any of your data stored on our servers.

We cannot help you if you lose your Personalized Encryption Key. Your encryption and decryption key is designed for your security. If you do not have access to the original software and do not have the printed page that you were prompted to print during the installation, then you willl not be able to access your backup! With 128-bit AES Encryption there is no "reset" key.

Asymmetric encryption works differently in that a user would have a key pair, one public and one private. These keys are carefully chosen so that a message encrypted with a public key could only be decrypted with the private key. So for example, the sender would locate the receiver's public key (they could even have it emailed to them, since it is public information), and use that to encrypt the message. The receiver would then decrypt the message with their private key.

No. We cannot recover your encryption key, this is chosen and set by you and is maintained by you and your system, making it invisible to us and anyone else for that matter. top

No problem. While subscribing you will set a general password. You may also want to set up a secret encryption key after you download the Nauticus client software. It's necessary to set the first password, but it's not necessary to use a secret encryption key although we recommend you do. We're able to resend you the general password, but not your encryption key. You'll be asked to enter a hint question in case you lose or forget your encryption key.

This depends on the server software and browsers used. Modern browsers and servers (from 2000 onwards) encipher the data with 128-bit, thus guaranteeing a very high degree of protection. When you are purchasing a SSL certificate, make sure it is suitable for this 128-bit encryption. This way, you provide visitors to your website with optimum protection.

Since data never leaves your computer unencrypted, you must have your password/encryption key to recover any files. If you have lost your password/encryption key, e-mail us at support@eCopySafe.com

The original content of the note is lost. We do not store the key and you are the only person that can remeber that piece of information.

Encryption garbles your data by using irreversible mathematical functions. It is simply the encoding of data so that it cannot be read by anyone who does not know the password that decodes it.

Unfortunately, encryption keys cannot be recovered. "Generate Online Backup Solution" recommends keeping a record of your encryption key offsite in a safe location.

MailControl Encryption is ideal where customers want to have fully scanned but secure e-mail delivery to trusted third parties. One big problem with e-mail encryption / key type protection is that the individual e-mails are encrypted. As a result some e-mail scanning services / products are not able to scan these e-mails to enforce security policies and detect spam, viruses and inappropriate material.

You can find classification of NAT in RFC 3489 – STUN http://www.faqs.org/rfcs/rfc3489.html. It should not mater what type of firewall you have.

Encryption uses a mathematical key to provide secrecy. Symmetric cryptography refers to encryption systems that use the same key to encrypt and decrypt. A longer explanation can be found here: There are many books that explain these concepts in more detail. We recommend Chapter XX of Secrets & Lies: Digital Security in a Networked World, by Bruce Schneier.