Method for file encryption
First Claim
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1. A method for file encryption of a plaintext file, comprising the steps of:
- hashing the plaintext file to produce a plaintext hash,encrypting the plaintext file to create ciphertext,hashing the ciphertext to produce a ciphertext hash,hashing the plaintext hash and the ciphertext hash to produce a result hash, andsealing the ciphertext together with the result hash, to produce an encrypted file.
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Abstract
A method for encryption and sealing of a plaintext file by hashing the plaintext file to produce a plaintext hash, encrypting the plaintext file to produce ciphertext, hashing the ciphertext to produce a ciphertext hash, hashing the plaintext hash and the ciphertext hash to produce a result hash, and sealing the ciphertext together with the result hash. This provides verification for non-repudiation and protects against undetected malware corrupting the plaintext or ciphertext files.
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10 Claims
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1. A method for file encryption of a plaintext file, comprising the steps of:
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hashing the plaintext file to produce a plaintext hash, encrypting the plaintext file to create ciphertext, hashing the ciphertext to produce a ciphertext hash, hashing the plaintext hash and the ciphertext hash to produce a result hash, and sealing the ciphertext together with the result hash, to produce an encrypted file. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification