Hi, I'm Shubham Kulkarni

Developed a Python-based cryptography system and implemented AES-128 encryption from scratch. Conducted security analysis using brute-force and frequency-analysis techniques and validated cryptographic outputs with OpenSSL.

• Built a symmetric encryption system in Python
• Implemented custom encryption and decryption logic
• Added secure random key generation
• Developed a brute-force attack module
• Developed a frequency-analysis attack module
• Demonstrated weaknesses in predictable ciphers
• Implemented AES-128 encryption in ECB mode from scratch
• Implemented S-Box operations
• Implemented key expansion
• Implemented SubBytes
• Implemented ShiftRows
• Implemented MixColumns
• Built complete encryption and decryption pipelines
• Validated AES-128 results using OpenSSL
• Achieved matching encryption results during validation
• Strengthened knowledge of cryptographic workflows, security testing and key management

Provided technical support for hardware, software and network issues across Windows, Linux and macOS environments. Supported enterprise users and Cognizant projects through incident management, security compliance and structured escalation processes.

• Diagnosed and resolved hardware, software and network issues
• Supported Windows, Linux and macOS systems
• Managed security and compliance tasks involving MBAM, DLP and McAfee
• Resolved incidents and service requests using BMC Remedy
• Installed, configured and updated software and antivirus solutions
• Supported network printers and server-related issues
• Escalated complex incidents to appropriate technical teams
• Assisted users with Microsoft Office and enterprise applications
• Used scripting and secure processes for disk wiping and system preparation

Administered business applications, networks, servers, security systems and end-user infrastructure for an automotive organization. Supported business continuity, connectivity and daily IT operations.

• Configured and supported CTDMS and I-CROP applications
• Monitored connectivity with Toyota servers
• Configured and administered the CTI Server
• Managed the Cyberoam firewall
• Configured Outlook Express and email services
• Configured and maintained ERP software
• Managed Automated System Recovery backups
• Administered centralized call-centre applications and servers
• Updated antivirus and security software
• Delivered software and desktop support
• Developed and updated the company website
• Troubleshot internet and LAN connectivity
• Maintained the local area network
• Generated computerized business reports
• Monitored and troubleshot CCTV systems
• Maintained CCTV connectivity
• Troubleshot IP-PBX systems
• Managed Tally backups and troubleshooting