QUANTUM SAFE PKI TRANSITIONS
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1 QUANTUM SAFE PKI TRANSITIONS
2 Quantum Valley Investments Headquarters We offer quantum readiness assessments to help you identify your organization s quantum risks, develop an upgrade path, and deliver a plan to move forward. We created the first commercially available security solution to offer quantum resistant algorithms that can replace the classical algorithms that are weak against quantum computing threats.
3 Agenda Threat The Authentication Challenge Options Conclusions and Recommendations
4 Quantum Computing Threat
5 Why Quantum Computers? Exploiting the power of quantum physics to create a new way of computing, with applications to: Drug design Materials science Unstructured search Code breaking Machine learning Chemistry and physics simulations
6 Cryptographic Challenges For A Post Quantum World Today s security solutions rely on the complexity of the underlying mathematical problems that form the foundation for modern cryptographic systems. The massive processing capabilities found in quantum computers will challenge our current beliefs around complexity.
7 What needs to be protected today? Any encrypted data where key establishment is communicated or stored along with it will not remain confidential beyond Y2Q. Any digital documents signed today that must maintain their authenticity beyond Y2Q. Any signed software that needs to remain authentic at crossover point.
8 So, What Is Vulnerable? PRODUCTS which derive their security from these protocols and cryptosystems SECURITY PROTOCOLS relying upon any of these cryptosystems CRYPTOSYSTEMS that have been built on the presumed difficulty of discrete log or integer factorization This is the case for anything that is encrypted after a large-scale quantum computer has been built, anything we encrypt today, and anything we encrypted in the past!
9 Quantum Computing Authentication
10 Code Signing Authenticity of software updates are essential to trust Digital signatures are ubiquitous with software updates Frequency of updates are much less than authentication requests at a web server, for example Hash Based Signatures provide a safe option
11 Secure continues to be the main communication medium for business Large amounts of sensitive information continues to be sent Mail server breaches can cause enormous brand/financial/trust damage can be protected by Server to server encryption Services such as S/MIME and PGP S/MIME and PGP differ on key management Imply need for PKI transition
12 Quantum Safe Deployment Challenges Moderate deployment effort with a phased deployment possible. Timeline: Years. Legacy Classic Connection Quantum-Safe Connection Upgraded
13
14 Quantum Computing PKI
15 Quantum Resistant PKI Enterprise PKI supporting remote VPN can be quite large and cannot be updated overnight. To avoid service stoppage a sophisticated strategy, clever mechanism, and systematic method are needed to gradually migrate the monolithic PKI system to new algorithms that allow mixture of algorithms, including interim choices of algorithms.
16 X509 Certificate Chain Issuer = Root CA Subject = Root CA Sign Public Key Signature Extensions Private Key Sign Issuer = Root CA Subject = Intermediate CA Public Key Signature Extensions Private Key Sign Issuer = Intermediate CA Subject = SSL Server Public Key Signature Extensions Private Key
17 Enterprise Infrastructure CA VPN (SSL) Secure (S/MIME) Web Apps (HTTPS)
18 Upgrade Approaches Forklift upgrade Expensive! Requires you to wait until all systems are made Quantum Safe Many failure points tested all at once Infrastructure risk through waiting
19 Upgrade Approaches Running a Parallel Infrastructure Multiple user credentials to individually manage Two smart cards? User training on which system to use at which particular moment Cost of running two instances of your systems
20 Applying Hybrid Ideas to Authentication Using Hash Based Signatures for Root Certificates Subordinate CAs signed with LMS/XMSS Public Key is RSA/ECC End-entity certificates signed with quantum vulnerable scheme Upgrade subordinate CAs, and end entities, as stateless options are finalized Root certificates finalized early Migration across browsers is slow
21 X509 Certificate Chain Issuer = Root CA Subject = Root CA Sign QR Public Key QR Signature Extensions QR Private Key Sign Issuer = Root CA Subject = Intermediate CA Public Key QR Signature Extensions Private Key Sign Issuer = Intermediate CA Subject = SSL Server Public Key Signature Extensions Private Key
22 Applying Hybrid Ideas to Authentication Creating Hybrid Certificates Utilize aspects of X.509 to include both quantum vulnerable and resistant keys Allow for an in-place migration of PKI credentials and applications Upgrade systems use quantum resistant credentials Legacy systems continue to quantum vulnerable keys/signatures
23 Phase One Enterprise Infrastructure CA VPN (SSL) Secure (S/MIME) Web Apps (HTTPS)
24 Phase One Certificate Subject Issuer Validity Public Key Basic Fields Extensions QR Public Key Signature Phase One Hybrid Certificate Subject Issuer Validity Public Key Signature Basic Fields Extensions QR Public Key
25 Phase One X509 Certificate Chain Issuer = Root CA Subject = Root CA Sign Public Key Signature Extensions Private Key Sign Issuer = Root CA Subject = Intermediate CA Public Key Signature Extensions Private Key Sign Issuer = Intermediate CA Subject = SSL Server Public Key Signature QR Public Key Private Key QR Private Key
26 Phase Two Enterprise Infrastructure CA VPN (SSL) Secure (S/MIME) Web Apps (HTTPS)
27 Phase Two Certificate Subject Issuer Validity Public Key Basic Fields Extensions QR Public Key QR Signature Signature Phase Two Hybrid Certificate Subject Issuer Validity Public Key Signature Basic Fields Extensions QR Public Key QR Signature
28 Phase Two X509 Certificate Chain Issuer = Root CA Subject = Root CA Sign Sign Public Key Signature QR Public Key QR Signature Private Key QR Private Key Sign Sign Issuer = Root CA Subject = Intermediate CA Public Key Signature QR Public Key QR Signature Sign Issuer = Intermediate CA Subject = SSL Server Public Key Signature Private Key QR Private Key Sign QR Public Key QR Signature Private Key QR Private Key
29 Phase Three Enterprise Infrastructure CA VPN (SSL) Secure (S/MIME) Web Apps (HTTPS)
30 Phase Three Certificate Basic Fields Subject Issuer Validity QR Public Key QR Signature Phase Three Certificate Basic Fields Subject Issuer Validity QR Public Key QR Signature
31 Example
32 Quantum Safe Cryptography Options for PKI
33 Hash-Based Signatures Well studied and trusted Fast operations and compact public key But State management Private key sizes
34 Code-Based Crypto McEliece key transport with Goppa codes still well trusted But Focus on key transport, not signature schemes Key sizes! Constructions do exist focused on Niederreiter variant
35 Lattice Cryptography Lattice based cryptography offers very fast quantum resistant schemes with excellent key sizes, in the Ring variants But Signature space is much less mature BLISS and pqntrusign TESLA
36 Isogeny-Based Cryptography Offers crypto based off different hard problems E φ ' φ $ But No efficient signature schemes available E/ R ' φ ' P $ φ ' Q $ φ ' R $ φ $ R ' E/ R $ φ $ P ' φ $ Q ' Still based off modified Zero Knowledge proof constructions Quite slow ψ ' ψ $ ae/ R ' E/ R ', R $ E/ R $ φ ' R $ φ $ R '
37 Multivariate Public Key Cryptography Offers a variety of digital signature options such as Rainbow, UOV, HFEv- Work has been done on getting it to work on smart cards But Popularity more geographically centred Public key size not as competitive as Hash Based Fewer academic publications
38 Quantum Key Distribution Promises a physics based approach to Quantum Security But Focus is key distribution Requires a Quantum Resistant algorithm, from the previous slides, to authenticate the exchange Physical limitations
39 Quantum Computing Conclusions and Recommendations
40 When Does The Clock Run Out? While this seems enormous, its like drinking the ocean We do have viable solutions today and more are coming. Start planning your transition today!
41 Thank you!
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