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Ubify Core Engineering Team
SOFTWARE ENGINEERS & SYSTEMS ARCHITECTS
About This Tool
In digital forensics and litigation e-discovery, maintaining an unbroken chain of custody is essential to ensure evidentiary integrity and admissibility in court. Forensic technicians record each custodial transfer, media acquisition, and forensic duplicate along with cryptographic verification hashes (such as SHA-256 or MD5) to prove evidence has not been altered or tampered with since collection.
### Digital Chain of Custody Principles A compliant chain of custody record under standards like NIST SP 800-86 requires comprehensive documentation:
- **Source Acquisition Data:** Device serial number, forensic imaging tool version, write-blocker hardware verification, and bit-stream image size. - **Cryptographic Hash Verification:** Matching pre-acquisition and post-acquisition hashes to verify mathematical identity. - **Custodial Log Entries:** Date, timestamp, releasing party signature, receiving custodian credentials, and secure evidence vault location.
### Tool Implementation Notice The interactive calculator on this page provides an arithmetic ratio modeling interface using three input parameters: Primary Dimension / Load (Value 1), Operating Coefficient (Value 2), and Safety / Rate Factor (Value 3). It evaluates the product-over-divisor ratio (Value 1 * Value 2) / Value 3, geometric mean root sqrt(Value 1 * Value 2), and relative proportion Value 1 / (Value 1 + Value 2). This tool is an arithmetic modeling framework; it does not compute cryptographic checksums on uploaded files, does not connect to formal evidence management software, and does not generate legally binding forensic chain-of-custody receipts.
### Worked Numeric Example A forensic e-discovery team audits custodial record allocations across 120 digital evidence packages:
- **Primary Dimension / Load (Value 1):** 120 (total evidence work items) - **Operating Coefficient (Value 2):** 15 (estimated audit checkpoints per package) - **Safety / Rate Factor (Value 3):** 6 (audit verification tier divisor) - **Calculated Primary Quotient:** (120 * 15) / 6 = **300.00** - **Root Geometric Factor:** sqrt(120 * 15) = **42.43** - **Allocation Proportion:** (120 / (120 + 15)) * 100 = **88.89%**
### Client-Side Privacy Note All calculations execute exclusively within your local browser runtime via React state. Zero evidence logs, forensic notes, case identifiers, or numbers are transmitted across any network or saved on our servers.
How to Use
- 1
Enter your initial evidence volume or primary load parameter into the first field.
- 2
Enter your operating checkpoint coefficient into the second field.
- 3
Set your verification rate factor or safety divisor in the third field.
- 4
Review the calculated primary quotient, root metric, and percentage proportion directly on screen.
Frequently Asked Questions
Does this tool compute SHA-256 or cryptographic hashes on files?
No. This calculator is a client-side arithmetic ratio modeling tool. It does not ingest binary files or compute cryptographic checksums. For file hashing, use dedicated command-line utilities (like sha256sum) or browser hashing tools.
What is required for a legally admissible digital chain of custody?
Admissible chain of custody logs require contemporaneous records of evidence collection, physical transfers, custodial signatures, write-blocker verification, and cryptographic hash verification logs.
Is any evidence or case information transmitted to a server?
No. All calculations run strictly in your web browser memory. UBify never collects, logs, or stores your inputs.