encrypted voip

I. OverviewTruecrypt is the only virtual encrypted disk software that supports Windows Vista/XP/2000/Linux open source. It can create and set encrypted virtual disk images, and the virtual disk can be accessed as normal as other disks, all internal files are automatically encrypted and accessed using passwords. encryption and decryption are both real-time.Truecry

. However, this will inevitably reduce the versatility of the disc and the practical value of the engraved disc will be greatly reduced. Therefore, this type of technology is of little significance to ordinary users, and there are few such products on the market. Another type is to use "overburn ". The so-called "overburn" can be understood in two ways. One is to burn data that exceeds the nominal value. The nominal value usually refers to the standard value: 74min @ 650mb and 80min @ 700 mb. B

In our Internet cafes, we often need to hide some disk partitions. The common method is to use the partition magician, registry, and other methods to hide, but these methods are easy to crack, more importantly, it hides the entire partition, which lacks flexibility. Once the required hidden space increases and needs to be adjusted, it will become very troublesome and time-consuming. Now I will introduce a software that can solve this problem. With it, It is very convenient and flexible to hide a

Http://blog.csdn.net/jiyanfeng1/article/details/8173733 From: http://blog.csdn.net/laotse/article/details/5910378 First, three concepts: 1. irreversible encryption 2. reversible symmetric encryption 3. reversible asymmetric encryption 1. irreversible encryption. The most familiar type is MD5 sha1, which cannot be decrypted after encryption. It can only be used to store passwords and verify file changes, and cannot be used for network communication. 2. reversible and symmetric encryption: Use a

At ordinary times, we are used to storing a large number of files in a USB flash drive and passing files easily. However, an indisputable fact is in front of us, that is, the security of files. General USB flash drives do not provide encryption functions. Anyone can view the content through the USB flash drive. However, the price of the Encrypted USB flash drive sold on the market is expensive. After the purchase, it will cause a waste of existing USB

do they need to put all the data in their laptops? Why do people who cannot afford cars with high security performance need to transport a large box of sensitive information backup tapes? How do they know what data is lost and whether the data is encrypted or properly protected? There are still many questions that cannot be answered. The topic of this article is how to use an encrypted file system to prote

PDF encryption and decryption (3)-Crack encrypted PDF files 1. General password verification I think many people will always think about what they will do before learning a technology or other things. For example, the decryption of PDF files, I will think that the file content is encrypted, you must have a key to decrypt the file. This must be related to the required password. So what is the relationship b

For the special operating system of Vista, there is indeed a lack of human nature in some configuration aspects. In the previous article, we introduced the wireless network configuration in the Vista system. Next we will introduce the encryption of the wireless network in the Vista system. Vista system encrypted wireless network 1. enable WEP encrypted wireless network: First, connect to our wireless router

Friends who use Windows XP know that the thing that bothers them most is that they forgot to export a certificate that backs up EFS encrypted files when they reload the system. What happens when this happens? Can't you just watch these files? Do you want to reuse these encrypted files? Then follow me, but this method of decrypting files is required for encrypting files. Requirements: EFS

Create encrypted compressed files under Linux Method One:* 1. Create an encrypted zip file using the zip command:* 2. When extracting encrypted files, you will be prompted to enter your password: Method Two:* 1. Create a ZIP file using 7z:* 2. Unzip the encrypted file: Method Three:* 1.To Create a

EFS (Encrypting File System, encrypting filesystem) is a practical feature unique to Windows 2000/XP that can be stored directly by the operating system for files and data on NTFS volumes, greatly improving the security of the data. EFS encryption is based on a public key policy. The encrypted file is then created using the FEK and data extension standard x algorithms. If you log into a domain environment, the key generation relies on the domain contr