A virtual tape library (VTL) is a technology for data backup and recovery that uses tape libraries or tape drives along with their existing software for backup.The virtual tape library system emulates the former magnetic tape devices and data formats, but performs much faster data backups and recovery. It is able to avoid the data streaming...
A private key is a tiny bit of code that is paired with a public key to set off algorithms for text encryption and decryption. It is created as part of public key cryptography during asymmetric-key encryption and used to decrypt and transform a message to a readable format. Public and private keys are paired for secure communication, such as email.
A private key is shared only with the key's initiator, ensuring security. For example, A and B represent a message sender and message recipient, respectively. Each has its own pair of public and private keys. A, the message initiator or sender, sends a message to B. A's message is encrypted with B’s public key, while B uses its private key to decrypt A’s received message.
A digital signature, or digital certificate, is used to ensure that A is the original message sender. To verify this, B uses the following steps:
In short, sending encrypted messages requires that the sender use the recipient's public key and its own private key for encryption of the digital certificate. Thus, the recipient uses its own private key for message decryption, whereas the sender's public key is used for digital certificate decryption.
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