Patents by Inventor Mathivanan Venkatachalam
Mathivanan Venkatachalam has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11889013Abstract: An administrative or relay device can communicate with a target device, for example to disable lost or stolen devices using an SMS command. The SMS command is encrypted to prevent malicious attacks. The SMS command includes a universal device identifier unique to the target device, the phone number of the relaying device, and a time stamp memorializing command creation. The relaying device relays the encrypted command to the target device. Successful decryption authenticates the administrative or relay device. Before executing the command, however, the target device reviews the unique identifier to verify the target and compares the phone number of the relaying device with the number identified with the incoming SMS message to authenticate the relaying device. The target device also considers an embedded time stamp to determine whether the command is superseded by a subsequently issued though later received command.Type: GrantFiled: March 3, 2022Date of Patent: January 30, 2024Assignee: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam
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Publication number: 20230222216Abstract: Described are methods and systems that prevent malicious software from deleting shadow copies of computer files that might be required to restore user data in the event of a ransomware attack. A user layer includes a volume snapshot service that makes shadow copies and includes a hook to intercept delete requests. A kernel layer includes a filter to disallow shadow-copy deletion requests directed from the user layer to the operating-system.Type: ApplicationFiled: March 13, 2023Publication date: July 13, 2023Applicant: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Vishal Santharam, Kirubagaran Thangasami
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Publication number: 20230078476Abstract: Described are methods and systems for detecting a ransomware process acting on files organized in folders of a file system. A subfolder path is identified for each file acted upon by a suspect process and the paths are combined into a number of unique paths for the suspect process. If the number of unique paths exceeds a threshold, the suspect process is categorized as malware. The methods and systems also include a hook and a filter to prevent shadow-copy deletions that would otherwise interfere with file recovery.Type: ApplicationFiled: July 13, 2022Publication date: March 16, 2023Applicant: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Vishal Santharam, Kirubagaran Thangasami
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Patent number: 11558499Abstract: An administrator can use an administrative-wireless-device to control a target wireless device using an SMS message to convey a command. The data of the command message can be encrypted to prevent malicious attacks. The encrypted data may include a universal device identifier unique to the target device, the phone number of the administrative-wireless-device, and a time stamp memorializing command or message creation. Before executing the command, however, the target device compares the phone number of the administrative-wireless-device with the number identified with the incoming SMS message to authenticate the administrative-wireless-device.Type: GrantFiled: June 29, 2021Date of Patent: January 17, 2023Assignee: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam, Arthur Behiel, Sudheer Grandhi
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Publication number: 20220256026Abstract: An administrative or relay device can communicate with a target device, for example to disable lost or stolen devices using an SMS command. The SMS command is encrypted to prevent malicious attacks. The SMS command includes a universal device identifier unique to the target device, the phone number of the relaying device, and a time stamp memorializing command creation. The relaying device relays the encrypted command to the target device. Successful decryption authenticates the administrative or relay device. Before executing the command, however, the target device reviews the unique identifier to verify the target and compares the phone number of the relaying device with the number identified with the incoming SMS message to authenticate the relaying device. The target device also considers an embedded time stamp to determine whether the command is superseded by a subsequently issued though later received command.Type: ApplicationFiled: March 3, 2022Publication date: August 11, 2022Applicant: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam
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Patent number: 11297176Abstract: A first device communicates with a remote second device by sending an SMS message that includes an encrypted first device phone number portion and a command, which may also be encrypted. The second device receives the SMS message and decrypts the encrypted first device phone number portion to verify the authenticity of the message by comparing it with a first device phone number included with the message by a cellular carrier. Successful decryption authenticates the first device, and the command is then executed, after being decrypted if it had been encrypted. Further authentication can optionally include decrypting an encrypted unique device identifier and/or phone number of the second device. The second device may also consider an embedded time stamp to determine whether the command is superseded by a subsequently issued command.Type: GrantFiled: September 17, 2020Date of Patent: April 5, 2022Assignee: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam
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Publication number: 20210329119Abstract: An administrator can use an administrative-wireless-device to control a target wireless device using an SMS message to convey a command. The data of the command message can be encrypted to prevent malicious attacks. The encrypted data may include a universal device identifier unique to the target device, the phone number of the administrative-wireless-device, and a time stamp memorializing command or message creation. Before executing the command, however, the target device compares the phone number of the administrative-wireless-device with the number identified with the incoming SMS message to authenticate the administrative-wireless-device.Type: ApplicationFiled: June 29, 2021Publication date: October 21, 2021Applicant: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam, Arthur Behiel, Sudheer Grandhi
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Patent number: 11057510Abstract: An administrator charged with responsibility for one or more administered wireless devices can use a wireless device to disable lost or stolen devices using an SMS lost-mode message. The data of the lost-mode message can be encrypted to prevent malicious attacks. The encrypted data may include a universal device identifier unique to the target device, the phone number of the administrator's device, and a time stamp memorializing command or message creation. Successful decryption authenticates the administrator. Before executing the lost-mode command, however, the target device reviews the unique identifier to verify the target and compares the phone number of the administrator's device with the number identified with the incoming SMS message to authenticate the relaying device. The target device can also consider an embedded time stamp to determine whether the lost-device command has been superseded.Type: GrantFiled: April 28, 2020Date of Patent: July 6, 2021Assignee: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam, Arthur Behiel, Sudheer Grandhi
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Publication number: 20210084141Abstract: A first device communicates with a remote second device by sending an SMS message that includes an encrypted first device phone number portion and a command, which may also be encrypted. The second device receives the SMS message and decrypts the encrypted first device phone number portion to verify the authenticity of the message by comparing it with a first device phone number included with the message by a cellular carrier. Successful decryption authenticates the first device, and the command is then executed, after being decrypted if it had been encrypted. Further authentication can optionally include decrypting an encrypted unique device identifier and/or phone number of the second device. The second device may also consider an embedded time stamp to determine whether the command is superseded by a subsequently issued command.Type: ApplicationFiled: September 17, 2020Publication date: March 18, 2021Inventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam
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Patent number: 10785364Abstract: Described are systems and methods for responding to a lost-mode command directed to a target wireless device from a server to alter the functionality of the device, such as to restrict access to sensitive data. A relay device is selected at the server to act as intermediary between the server and the target wireless device. An encrypted message with both the lost-mode command and the relay-device phone number is relayed to the target wireless device. The target wireless device decrypts and parses the message to extract the lost-mode command and the relay-device phone number. To authenticate the relay device as the intended sender of the lost-mode command, the target wireless device compares the phone number of the message sender to the relay-device phone number specified in the message. The target wireless device disregards the lost-mode command if the sender's phone number does not match the relay-device phone number, and otherwise enters a “lost mode.Type: GrantFiled: July 16, 2019Date of Patent: September 22, 2020Assignee: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam
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Publication number: 20200260267Abstract: An administrator charged with responsibility for one or more administered wireless devices can use a wireless device to disable lost or stolen devices using an SMS lost-mode message. The data of the lost-mode message can be encrypted to prevent malicious attacks. The encrypted data may include a universal device identifier unique to the target device, the phone number of the administrator's device, and a time stamp memorializing command or message creation. Successful decryption authenticates the administrator. Before executing the lost-mode command, however, the target device reviews the unique identifier to verify the target and compares the phone number of the administrator's device with the number identified with the incoming SMS message to authenticate the relaying device. The target device can also consider an embedded time stamp to determine whether the lost-device command has been superseded.Type: ApplicationFiled: April 28, 2020Publication date: August 13, 2020Inventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam, Arthur Behiel, Sudheer Granhi
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Patent number: 10645570Abstract: An administrator charged with responsibility for one or more administered wireless devices can use a wireless device to disable lost or stolen devices using an SMS lost-mode message. The payload of the lost-mode message can be encrypted to prevent malicious attacks. The payload may include a universal device identifier unique to the target device, the phone number of the administrator's device, and a time stamp memorializing command or message creation. Successful decryption authenticates the administrator. Before executing the lost-mode command, however, the target device reviews the unique identifier to verify the target and compares the phone number of the administrator's device with the number identified with the incoming SMS message to authenticate the relaying device. The target device can also consider an embedded time stamp to determine whether the lost-device command has been superseded.Type: GrantFiled: October 6, 2018Date of Patent: May 5, 2020Assignee: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugesan Duraipandi, Vishal Santharam, Arthur Behiel, Sudheer Grandhi
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Patent number: 10362159Abstract: A server can disable lost or stolen devices using an SMS lost-mode command relayed via a relay mobile device. The SMS command is encrypted to prevent malicious attacks. The SMS command includes a universal device identifier unique to the target device, the phone number of the relaying device, and a time stamp memorializing command creation. The relaying device relays the encrypted lost-mode command to the target device. Successful decryption authenticates the server. Before executing the lost-mode command, however, the target device reviews the unique identifier to verify the target and compares the phone number of the relaying device with the number identified with the incoming SMS message to authenticate the relaying device. The target device also considers an embedded time stamp to determine whether the lost-device command is superseded by a subsequently issued though later received command from the server.Type: GrantFiled: October 6, 2018Date of Patent: July 23, 2019Assignee: Zoho Corporation Private LimitedInventors: Mathivanan Venkatachalam, Rajesh Ranganathan, Murugean Duraipandi, Vishal Santharam