Decoding of encrypted file

• US 9,516,037 B2
• Filed: 04/27/2016
• Issued: 12/06/2016
• Est. Priority Date: 07/27/2005
• Status: Active Grant

• Current Assignee: Kyndryl Incorporated
• Original Assignee: International Business Machines Corporation
• Inventors: Carro, Fernando Incertis
• Primary Examiner(s): Ravetti, Dante
• Application Number:
  US15/139,917
• Publication Number:
  US 20160241570A1
• Time in Patent Office: 223 Days
• Field of Search: 705/16, 705/21, 705/59, 705/71, 380/44, 380/262, 380/278, 380/279
• US Class Current: 1/1
• CPC Class Codes: G06F 3/165 Management of the audio stream, e.g. setting of volume, audio stream path
• CPC Class Codes: H04L 51/04 Real-time or near real-time messaging, e.g. instant messaging [IM]
• CPC Class Codes: H04L 51/08 Annexed information, e.g. attachments
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/061 for key exchange, e.g. in peer-to-peer networks cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838
• CPC Class Codes: H04L 63/0861 using biometrical features, e.g. fingerprint, retina-scan cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data H04L9/3231
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]

Abstract

A method and system for decoding an encrypted file. A recipient computer of a recipient: extracts an encoded address from a filename of the encrypted file, wherein the encoded address identifies where a voice check ticket is stored, wherein a prior name of the encrypted file and the encoded address are merged together within the filename; accesses the voice check ticket at the encoded address; receives, from the voice check ticket, voice check text; displays the received voice check text visually on a computer display of the recipient computer; receives an audio signal from a reading aloud, by the recipient, of the displayed voice check text; transmits the received audio signal to a server computer that includes a voice check server; receives an encryption key from the voice check server; and decrypts the received encrypted file using the received encryption key.

Claims

1. A method for decoding an encrypted file, said method comprising:

extracting, by a recipient computer of a recipient, an encoded address from a filename of the encrypted file, wherein the recipient computer previously received the encrypted file from a sender computer of a sender, wherein the encoded address identifies where a voice check ticket is stored, wherein the voice check ticket comprises voice check text, and wherein a prior name of the encrypted file and-the encoded address are merged together within the filename;

accessing, by the recipient computer, the voice check ticket at the encoded address extracted from the parsed filename;

receiving, by the recipient computer from the voice check ticket, the voice check text;

displaying, by the recipient computer, the received voice check text visually on a computer display of the recipient computer;

prompting, by the recipient computer, the recipient to read aloud the displayed voice check text;

receiving, by the recipient computer, an audio signal from a reading aloud by the prompted recipient of the displayed voice check text;

receiving, by the recipient computer from the server computer, an identifier of the recipient;

transmitting, by the recipient computer to a server computer comprising a voice check server, the received audio signal and the received identifier of the recipient;

receiving, by the recipient computer from the voice check server after the voice check server had received and validated the transmitted audio signal and identifier of the recipient, an encryption key previously used to generate the encrypted file; and

decrypting, by the recipient computer, the received encrypted file using the received encryption key.

2. The method of claim 1, wherein said voice check server had received and validated the transmitted audio signal and identifier of the recipient comprises said voice check server had:

converted the audio signal to first text,

determined that the first text matches the received voice check text,

generated a voiceprint of the audio signal, and

determined that the generated voiceprint matches a voiceprint stored in a voiceprint database of the voice check server and is associated with the transmitted identifier of the recipient.

3. The method of claim 1, wherein the voice check ticket further comprises the encryption key.

4. The method of claim 3, wherein the voice check ticket further comprises a voiceprint identifier assigned to a voiceprint of the recipient.

5. The method of claim 4, wherein the voice check ticket consists of the voiceprint identifier, the encryption key, and the voice check text.

6. The method of claim 1, wherein the address is a Universal Resource Locator (URL).

7. The method of claim 1, wherein said receiving the encrypted file comprises receiving the encrypted file as an attachment to an e-mail message from the sender to the recipient, and wherein the voice check text is a copy of a portion of e-mail text of the e-mail message.

8. A system comprising:

a recipient computer of a recipient; and

a computer-readable non-transitory storage medium storing instructions which, upon being executed by the recipient computer, causes the recipient computer to,

implement a method for decoding an encrypted file, said method comprising the steps of;

extracting, by the recipient computer, an encoded address from a filename of the encrypted file, wherein the recipient computer previously received the encrypted file from a sender computer of a sender,

wherein the encoded address identifies where a voice check ticket-is stored, wherein the voice check ticket comprises voice check text, and wherein a prior name of the encrypted file and the encoded address are merged together within the filename;

receiving, by the recipient computer from the voice check ticket, the voice check text;

displaying, by the recipient computer, the received voice check text visually on a computer display of the recipient computer;

prompting, by the recipient computer, the recipient to read aloud the displayed voice check text;

receiving, by the recipient computer, an audio signal from a reading aloud by the prompted recipient of the displayed voice check text;

receiving, by the recipient computer from the server computer, an identifier of the recipient;

transmitting, by the recipient computer to a server computer comprising a voice check server, the received audio signal and the received identifier of the recipient;

receiving, by the recipient computer from the voice check server after the voice check server had received and validated the transmitted audio signal and identifier of the recipient, an encryption key previously used to generate the encrypted file; and

decrypting, by the recipient computer, the received encrypted file using the received encryption key.

9. The system of claim 8, wherein the voice check ticket further comprises the encryption key.

10. The system of claim 9, wherein the voice check ticket further comprises a voiceprint identifier assigned to a voiceprint of the recipient.

11. The system of claim 10, wherein the voice check ticket consists of the voiceprint identifier, the encryption key, and the voice check text.

12. The system of claim 8, wherein the address is a Universal Resource Locator (URL).

13. The system of claim 8, wherein said receiving the encrypted file comprises receiving the encrypted file as an attachment to an e-mail message from the sender to the recipient, and wherein the voice check text is a copy of a portion of e-mail text of the e-mail message.

14. A non-transitory storage medium comprising instructions which, upon being executed by a recipient computer, causes the recipient computer to implement a method for decoding an encrypted file said method comprising the steps of:

extracting, by the recipient computer, an encoded address from a filename of the encrypted file, wherein the recipient computer previously received the encrypted file from a sender computer of a sender, wherein the encoded address identifies where a voice check ticket is stored, wherein the voice check ticket comprises voice check text, and wherein a prior name of the encrypted file and the encoded address are merged together within the filename;

receiving, by the recipient computer from the voice check ticket, the voice check text;

displaying, by the recipient computer, the received voice check text visually on a computer display of the recipient computer;

prompting, by the recipient computer, the recipient to read aloud the displayed voice check text;

receiving, by the recipient computer, an audio signal from a reading aloud by the prompted recipient of the displayed voice check text;

receiving, by the recipient computer from the server computer, an identifier of the recipient;

transmitting by the recipient computer to a server computer comprising a voice check server, the received audio signal and the received identifier of the recipient;

receiving, by the recipient computer from the voice check server after the voice check server had received and validated the transmitted audio signal and identifier of the recipient an encryption key previously used to generate the encrypted file; and

decrypting, by the recipient computer, the received encrypted file using the received encryption key.

15. The non-transitory storage medium of claim 14, wherein the voice check ticket further comprises the encryption key.

16. The non-transitory storage medium of claim 15, wherein the voice check ticket further comprises a voiceprint identifier assigned to a voiceprint of the recipient.

17. The non-transitory storage medium of claim 16, wherein the voice check ticket consists of the voiceprint identifier, the encryption key, and the voice check text.

18. The non-transitory storage medium of claim 14, wherein the address is a Universal Resource Locator (URL).