Saving and retrieving data based on public key encryption
First Claim
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1. A method comprising:
- obtaining a pair of inputs to be encrypted, the pair of inputs including data to be sealed and one or more conditions that are to be satisfied in order for the data to be unsealed; and
encrypting by a first device the pair of inputs using public key encryption and a same public key of a public/private key pair, the encrypting generating a ciphertext that includes both the encrypted data and the encrypted one or more conditions, wherein one of the one or more conditions comprises a time constraint for when the data can be unsealed, the time constraint comprising particular days of the week during which the data can be unsealed, and wherein the data is not unsealed if the one or more conditions are not satisfied.
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Abstract
In accordance with certain aspects, data is received from a calling program. Ciphertext that includes the data is generated, using public key encryption, in a manner that allows the data to be obtained from the ciphertext only if one or more conditions are satisfied. In accordance with another aspect, a bit string is received from a calling program. Data in the bit string is decrypted using public key decryption and returned to the calling program only if one or more conditions included in the bit string are satisfied.
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Citations
20 Claims
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1. A method comprising:
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obtaining a pair of inputs to be encrypted, the pair of inputs including data to be sealed and one or more conditions that are to be satisfied in order for the data to be unsealed; and encrypting by a first device the pair of inputs using public key encryption and a same public key of a public/private key pair, the encrypting generating a ciphertext that includes both the encrypted data and the encrypted one or more conditions, wherein one of the one or more conditions comprises a time constraint for when the data can be unsealed, the time constraint comprising particular days of the week during which the data can be unsealed, and wherein the data is not unsealed if the one or more conditions are not satisfied. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A computing device having one or more components implemented at least in part in hardware and that performs acts comprising:
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invoking, in the computing device, an operation to seal data; and receiving, in response to invoking the operation, a ciphertext including both encrypted data and encrypted one or more conditions that are to be satisfied in order for the data to be unsealed, the encrypted data as well as the encrypted one or more conditions having been generated by encrypting a pair of inputs including both data and one or more conditions using a same public key of a public/private key pair, wherein one of the one or more conditions comprises a time constraint identifying particular days of the week during which the data can be unsealed, wherein the data is not unsealed if the one or more conditions are not satisfied, and wherein the data and the one or more conditions are encrypted using public key encryption. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method comprising:
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invoking, in a device, an operation to have ciphertext decrypted; and receiving, in response to invoking the operation, decrypted data from the ciphertext only if an encrypted one or more conditions included in the ciphertext are satisfied, the encrypted data as well as the encrypted one or more conditions in the ciphertext having been decrypted using a same private key of a public/private key pair, wherein the one or more conditions comprises a time constraint for when the data can be unsealed, wherein the one or more conditions are satisfied only if a current day of the week is one of one or more particular days of the week identified by the time constraint, and wherein the ciphertext is decrypted using public key decryption. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification