Publication date : 02/20/2024
Course : Introduction to cryptography
Practical course - 3d
- 21h00 - Ref. CYP
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 | Master the vocabulary associated with cryptology: algorithm, hash, key |
| Learn about the algorithms most commonly used in cryptology |
| Identify methods for exchanging, managing and certifying public keys |
| Use symmetric and asymmetric encryption tools |
Intended audience
Security managers, developers, project managers.
Prerequisites
No special knowledge required.
Course schedule
1 Introduction
- History of the first encrypted documents.
- Cryptographic services.
- Mathematical concepts.
- Cryptographic security and attack techniques.
2 Stream Ciphers
- Introducing the concept.
- Linear Feedback Stream Register (LFSR): details of operation, Galois LFSR, applications.
- Other forms of flow encryption: RC4, SEAL.
3 Block ciphers
- Introducing the concept.
- The different forms: Electronic CodeBook (ECB), Cipher-Bloc Chaining (CBC), Cipher FeedBack (CFB)...
- Comparison of flow and block encryption.
- Data Encryption Standard (DES).
- Triple DES (3DES): presentation, operating procedures.
- Advanced Encryption Standard (AES).
- Complementary algorithms: IDEA, RC5, SAFER.
4 Asymmetric encryption
- The RSA algorithm in detail. Security and key size. RSA attacks and challenges. Practical applications.
- ElGamel encryption. ElGamel in DSA.
5 Hash functions
- Concept and objectives.
- Algorithmic principles. Mathematical properties.
- Practical justifications for the various properties.
- Security and hash length.
- Simple (Unkeyed) and secure (Keyed) hashing: block ciphering. MD4 function.
- Advanced attacks on hash functions.
- Technical presentation of hash functions: SHA-1, SHA-256 and SHA-512. MD5. Haval. RIPEMD-128...
6 Integrity and authentication
- Presentation. CBC-MAC standards. HMAC.
- Electronic signature. D.S.A. and R.S.A. signature.
7 Key management
- Key exchange with symmetrical and asymmetrical encryption. Exchange details.
- Diffie-Hellman algorithm. Man-in-the-middle attack.
- Public key management and certification.
- Key revocation, renewal and archiving.
- Certificates in X509 format, PKIX standard.
- Key management infrastructure (PKI).
8 Trusted third parties
- Presentation and standards. Architectures.
- Certification authority. Kerberos.
Customer reviews
4,2 / 5
Customer reviews are based on end-of-course evaluations. The score is calculated from all evaluations within the past year. Only reviews with a textual comment are displayed.
JEAN-CHRISTOPH B.
19/11/25
5 / 5
Ahmed is a well of knowledge, it would have taken 5 days to share even more information with us.
JEAN-MICHEL D.
19/11/25
5 / 5
Very popular trainer. The trainer's technical knowledge is impressive, with lots of examples for implementation, and he knows how to adapt perfectly to the audience, despite a course that is theoretically very abstruse.
ADELINE L.
19/11/25
4 / 5
The trainer has an excellent command of the subject, which is very much appreciated.
PARTICIPANTS
Security managers, developers, project managers.
PREREQUISITES
No special knowledge required.
TRAINER QUALIFICATIONS
The experts leading the training are specialists in the covered subjects. They have been approved by our instructional teams for both their professional knowledge and their teaching ability, for each course they teach. They have at least five to ten years of experience in their field and hold (or have held) decision-making positions in companies.
ASSESSMENT TERMS
The trainer evaluates each participant’s academic progress throughout the training using multiple choice, scenarios, hands-on work and more.
Participants also complete a placement test before and after the course to measure the skills they’ve developed.
TERMS AND DEADLINES
Registration must be completed 24 hours before the start of the training.
ACCESSIBILITY FOR PEOPLE WITH DISABILITIES
Do you need special accessibility accommodations? Contact Mrs. Fosse, Disability Manager, at psh-accueil@orsys.fr to review your request and its feasibility.
Security managers, developers, project managers.
PREREQUISITES
No special knowledge required.
TRAINER QUALIFICATIONS
The experts leading the training are specialists in the covered subjects. They have been approved by our instructional teams for both their professional knowledge and their teaching ability, for each course they teach. They have at least five to ten years of experience in their field and hold (or have held) decision-making positions in companies.
ASSESSMENT TERMS
The trainer evaluates each participant’s academic progress throughout the training using multiple choice, scenarios, hands-on work and more.
Participants also complete a placement test before and after the course to measure the skills they’ve developed.
TEACHING AIDS AND TECHNICAL RESOURCES
• The main teaching aids and instructional methods used in the training are audiovisual aids, documentation and course material, hands-on application exercises and corrected exercises for practical training courses, case studies and coverage of real cases for training seminars.
• At the end of each course or seminar, ORSYS provides participants with a course evaluation questionnaire that is analysed by our instructional teams.
• A check-in sheet for each half-day of attendance is provided at the end of the training, along with a course completion certificate if the trainee attended the entire session.
• The main teaching aids and instructional methods used in the training are audiovisual aids, documentation and course material, hands-on application exercises and corrected exercises for practical training courses, case studies and coverage of real cases for training seminars.
• At the end of each course or seminar, ORSYS provides participants with a course evaluation questionnaire that is analysed by our instructional teams.
• A check-in sheet for each half-day of attendance is provided at the end of the training, along with a course completion certificate if the trainee attended the entire session.
TERMS AND DEADLINES
Registration must be completed 24 hours before the start of the training.
ACCESSIBILITY FOR PEOPLE WITH DISABILITIES
Do you need special accessibility accommodations? Contact Mrs. Fosse, Disability Manager, at psh-accueil@orsys.fr to review your request and its feasibility.
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