No, it's not but some compressed files can be encrypted.
Compression
No. Encryption is not compression. Compression occurs before (and possibly again after) encryption when outgoing, and reversed when incoming. In all probability, the encrypted file is likely to be a few byes larger than the original source data, but since compression is applied first, the overall transmission is likely to be smaller than the source.
· Compression allows a user to compress files and folders and increase available storage on a hard disk. Encryption makes sure that your documents stay confidential. They are mutually exclusive. You cannot encrypt a compressed file and vice versa.
No.
D. Compression
prime numbers only be used as encryption keys as in encryption the numbers are coded inj the form of 0s and 1s ,i.e binary form.
Even though both data compression and encryption are methods that transform data in to a different format, the golas tried to achieve by them are different. Data compression is done with the intension of decreasing the size of data, while encryption is done to keep the data secret from third parties. Encrypted data cannot be decrypted easily. It requires the possession of a special piece of information called a key. Uncompressing compressed data do not require such special knowledge (such as a key), but it might require some special hardware depending on the data type.
The term "symmetric encryption" refers to a form of computerized cryptography that uses a singular encryption key to guise an electronic message so that it can be sent in a secure manner.
Folder encryption is a form of disk encryption where individual files or directories are encrypted by the file system itself. More information can be found at Microsoft.
encryption
If the checksum did change during transmission, wouldn't that mean a transmission error occurred? Any compression or encryption in the middle of transmission affects the data at that moment, but that's the wrong time to try to calculate a checksum for comparison purposes. (Unless it is yet another layer of error checking, used after compression/encryption but before transmission, and again after reception but before decompression/decryption.)
Compression.