How Asymmetric Encryption WorksĪsymmetric encryption (also called public key cryptography) works by generating pairs of mathematically related keys. The Advanced Encryption Standard (AES) is considered more reliable because it uses a 128-bit, a 192-bit or a 256-bit key. It is not often used for highly sensitive communications, however, because both parties are required to have access to the same secret key.Ī well-known symmetric encryption algorithm is the Data Encryption Standard (DES), which uses a 56-bit key and is not considered attack-proof. This type of encryption is fast, efficient and well-suited for encrypting documents. Symmetric encryption ciphers use the same key to encrypt and decrypt a message and are often simply passwords. Often the most difficult problems in encryption is key management, which includes the generation, use, archiving and deletion of symmetric and asymmetric encryption keys. Block ciphers break data into larger segments, typically about 64 bits, before encrypting it. Stream ciphers, which are used mostly for real-time communications, encrypt data one bit or byte at a time. Once data is encrypted, it can only be turned back into plain text and made readable again by using the correct encryption key.Įncryption is essential for ensuring the trusted delivery and storage of sensitive information. Encrypted data usually looks like a long sequence of random letters and numbers.
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