Best Public Key Infrastructure (PKI) Apps for iPhone of 2025

Compare the Top Public Key Infrastructure (PKI) Apps for iPhone as of July 2025

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What are Public Key Infrastructure (PKI) Apps for iPhone?

Public Key Infrastructure (PKI) software provides a framework for secure communications, managing digital certificates and encryption keys for data protection and identity verification. It enables organizations to authenticate users, devices, and applications, ensuring that only authorized entities can access sensitive information. PKI software supports encryption, enabling secure data exchange over networks by encrypting data with a public key that only a corresponding private key can decrypt. It also facilitates digital signatures, providing non-repudiation and ensuring data integrity by verifying that the data has not been altered. Overall, PKI software is essential for establishing trust in digital communications, especially in environments requiring high-security standards, such as government and financial institutions. Compare and read user reviews of the best Public Key Infrastructure (PKI) apps for iPhone currently available using the table below. This list is updated regularly.

1

iCrypto

iCrypto

Designed to be used with our entire suite of iCrypto cloud-based services, the iCrypto SDK can integrate into existing Enterprise Apps or when deployed as iCrypto App be used as a standalone one-step password-less verification solution. By employing the latest cryptography technologies in combination with device-level security and management, the iCrypto SDK is the ultimate software token that can be used as a biometric ID on the go in a wide variety of industries. iCrypto SDK provides authenticator PKI signatures, a range of cryptographic protocols such as TOTP/HOTP/OCRA/MTP, push-based authentication, on-device as well as network-based biometrics such as fingerprint, iris scan, face/voice/eyeball recognition, third-party authorization, secure storage, context collection and host of security features.

Starting Price: Free

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2

SigningHub

Ascertia

Significant cost savings can be made when paper-based processes are moved on-line. For some documents it is vital to ensure traceability, accountability and audit with clear legal weight, data integrity and individual signed approval together with easy to access workflow process evidence. SigningHub enables quick, efficient on-line approval of any business document, agreement, report, request or package. SigningHub supports basic e-Signatures, Advanced e-Signatures and EU Qualified Signatures. The best way to prove a document is unchanged from the time of signing is to use cryptographic digital signatures. Organisations need to show that their internal controls are effective and compliant with local legislation and regulations. Ascertia has offered world-class PKI products for years. SigningHub brings together all of this capability and knowledge to provide the most secure way to sign documents.

Starting Price: $12.10/month/user

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3

4identity

Bit4id

4identity is the technological solution developed by Bit4id that empowers web applications with Digital Signature and Authentication processes. 4identity does not use Java Applets or any other third party add-on. It is simple, its is compatible with any web browser and works under the most used operating systems. The “integration-less” Engine to add Digital Signature and Strong Authentication to web applications through a simple API. 4identity means usability, providing a “1-click signing” user experience. Bit4id has extensive knowledge and experience in the development of software and tools for security and digital identity management based on Public Key Infrastructure (PKI). Providing solutions for managing more than 10 million digital identities, and processing more than 50 million digital signatures a year, Bit4id is a company leading in innovation for the PKI and digital identity market in Europe and Latin America.

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4

Entrust Identity Enterprise

Entrust

The world's most proven on-prem identity & access management (IAM) solution for strong digital security. Identity Enterprise is an integrated IAM platform that supports a full suite of workforce, consumer, and citizen use cases. Ideally suited for high-assurance applications that require a Zero Trust approach for thousands or millions of users, Identity Enterprise can be deployed on-premises or as a virtual appliance. Never trust, always verify. Protect your organization and user communities both inside and outside the perimeter. Secure workforce, consumer, and citizen identities with high assurance use case coverage including credential-based access, smart card issuance, and best-in-class MFA. Limit user friction with adaptive risk-based authentication, passwordless login, and cloud app federation. Option to use digital certificates (PKI) for a higher level of security when and where warranted, either with a physical smart card or a virtual smart card.

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5

KeyTalk

KeyTalk

KeyTalk is independent of Certificate Authorities and linked to a large number of public CAs both GMO GlobalSign and Digicert QuoVadis. Switching between CAs is simple and easy, even when thousands of certificates and end-points are involved. A vendor lock-in is therefore no longer the case. KeyTalk contains an internal CA for the generation of private certificates and keys. Did you use previously expensive public certificates for internal purposes? Or did you run into the limited functionality of Microsoft CS and other private CAs? Then, you will like our internal CA, private PKI certificate issuance. KeyTalk keeps track of the lifecycle of your certificates in a fully automated way. This way, you always have a complete and up to date overview of all your certificates, including the certificate name, SAN and validity. Also, things like used crypto keys and algorithms of internal and external certificates can be included.

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6

Nebula

Defined Networking

Innovative companies with high expectations of availablility and reliability run their networks with Nebula. Slack open sourced the project after years of R&D and deploying it at scale. Nebula is a lightweight service that’s easy to distribute and configure on modern operating systems. It runs on a wide variety of hardware including x86, arm, mips, and ppc. Traditional VPNs come with availability and performance bottlenecks. Nebula is decentralized: Encrypted tunnels are created per-host and on-demand as needed. Created by security engineers, Nebula leverages trusted crypto libraries (Noise), includes a built-in firewall with granular security groups, and uses the best parts of PKI to authenticate hosts.

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7

SeaCat

TeskaLabs

Cyber-security and data privacy platform for mobile and IoT applications. Build and operate the app free from any cyber-security incident. SeaCat is a cyber-security platform created by experts, and it features all cyber-security and data privacy must-haves. SeaCat deployment is smooth and hassle-free. SeaCat improves your security level instantly, with no need for custom development. Cyber-security should not come at the cost of the user experience. SeaCat requires no pesky configurations or procedures on the part of the user; SeaCat employs all modern cyber-security features, such as biometrical authorization,  and hardware security modules. SeaCat cyber-security platform consists of a SeaCat SDK that is to be added to a mobile or IoT application, the SeaCat Gateway that is to be installed into the demilitarized zone (DMZ) in front of the application backend servers, and SeaCat PKI that is a service that provides enrolment, access, and identity management.

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