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Symmetric-key Cryptography
Symmetric-key algorithms are algorithms for cryptography that use the same Key (cryptography), cryptographic keys for both the encryption of plaintext and the decryption of ciphertext. The keys may be identical, or there may be a simple transformation to go between the two keys. The keys, in practice, represent a shared secret between two or more parties that can be used to maintain a private information link. The requirement that both parties have access to the secret key is one of the main drawbacks of symmetric-key encryption, in comparison to Public key encryption, public-key encryption (also known as asymmetric-key encryption). However, symmetric-key encryption algorithms are usually better for bulk encryption. With exception of the one-time pad they have a smaller key size, which means less storage space and faster transmission. Due to this, asymmetric-key encryption is often used to exchange the secret key for symmetric-key encryption. Types Symmetric-key encryption can us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simple Symmetric Encryption-en
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