instagram story viewer > #Cryptography

#Cryptography

Posts
🔐 DIGITAL SIGNATURE — HOW DO WE TRUST A DIGITAL DOCUMENT? Ever wondered how we verify who signed a digital document and whether it has been modified? 🤔 A Digital Signature uses cryptography to help verify a signer's authenticity and check document integrity. ⚙️ How it works: 📄 Document → 🔑 Private Key → ✍️ Digital Signature → 🔓 Public Key Verification → ✅ Verified! 🛡️ Why it matters: • Authenticity — verifies the claimed signer • Integrity — helps detect document changes • Non-repudiation — provides evidence that can help link a signature to its signer, depending on the system and circumstances 💡 Remember: A digital signature is not the same as encryption; its primary purpose is verification, not hiding the document's contents. 📚 Want to learn how to sign and verify a file practically? Comment “SIGN” and let’s explore digital signatures hands-on! Follow @THEWHITEHATGUY for more cybersecurity concepts. 🛡️ #DigitalSignature #CyberSecurity #Cryptography #EthicalHacking #infosec
🔐 DIGITAL SIGNATURE — HOW DO WE TRUST A DIGITAL DOCUMENT? Ever wondered how we verify who signed a digital document and whether it has been modified? 🤔 A Digital Signature uses cryptography to help verify a signer's authenticity and check document integrity. ⚙️ How it works: 📄 Document → 🔑 Private Key → ✍️ Digital Signature → 🔓 Public Key Verification → ✅ Verified! 🛡️ Why it matters: • Authenticity — verifies the claimed signer • Integrity — helps detect document changes • Non-repudiation — provides evidence that can help link a signature to its signer, depending on the system and circumstances 💡 Remember: A digital signature is not the same as encryption; its primary purpose is verification, not hiding the document's contents. 📚 Want to learn how to sign and verify a file practically? Comment “SIGN” and let’s explore digital signatures hands-on! Follow @THEWHITEHATGUY for more cybersecurity concepts. 🛡️ #DigitalSignature #CyberSecurity #Cryptography #EthicalHacking #infosec
How can a tiny NFC tag prove it’s genuine? 📱🔐 The answer involves AES-128 cryptography. A basic NFC tag might simply store a URL. But chips like NTAG424 DNA can generate a Secure Unique NFC Message (SUN) that changes with each tap. The tag can include data such as a tap counter and cryptographic authentication value. Your phone reads it and sends it to a server, which uses a secret key to verify that the message is genuine. Copying the visible URL isn’t enough. Without the secret key, an attacker can’t simply generate a valid authenticated message. But NTAG424 DNA and MIFARE DESFire EV3 serve different purposes. 🔐 NTAG424 DNA → secure NFC authentication and product verification 💳 DESFire EV3 → multi-application smart cards, access control, transport, and secure data storage And remember: NFC = wireless communication AES-128 = cryptographic protection SUN = tap-specific authentication data But AES alone doesn’t guarantee security. Key management, replay protection, authentication, and backend design matter too. #NFC #AES128 #CyberSecurity #RFID #Cryptography
How can a tiny NFC tag prove it’s genuine? 📱🔐 The answer involves AES-128 cryptography. A basic NFC tag might simply store a URL. But chips like NTAG424 DNA can generate a Secure Unique NFC Message (SUN) that changes with each tap. The tag can include data such as a tap counter and cryptographic authentication value. Your phone reads it and sends it to a server, which uses a secret key to verify that the message is genuine. Copying the visible URL isn’t enough. Without the secret key, an attacker can’t simply generate a valid authenticated message. But NTAG424 DNA and MIFARE DESFire EV3 serve different purposes. 🔐 NTAG424 DNA → secure NFC authentication and product verification 💳 DESFire EV3 → multi-application smart cards, access control, transport, and secure data storage And remember: NFC = wireless communication AES-128 = cryptographic protection SUN = tap-specific authentication data But AES alone doesn’t guarantee security. Key management, replay protection, authentication, and backend design matter too. #NFC #AES128 #CyberSecurity #RFID #Cryptography
You can find all the details on www.hack4bug.org Capture The Flag (CTF) challenges are one of the best ways to develop practical cybersecurity skills. They provide hands-on experience in areas such as web security, cryptography, digital forensics, reverse engineering, and network security. By solving real-world security problems in a controlled environment, participants strengthen their critical thinking, problem-solving abilities, and understanding of cyber threats, making them better prepared for real-world cybersecurity challenges. #cybersecurity #ethicalhacking #hack #hack4bug #naqaab_bhai #naqaab50 #itcn #itcnasia #itcnasia2026 Special Thanks to @usmanisudais !
You can find all the details on www.hack4bug.org Capture The Flag (CTF) challenges are one of the best ways to develop practical cybersecurity skills. They provide hands-on experience in areas such as web security, cryptography, digital forensics, reverse engineering, and network security. By solving real-world security problems in a controlled environment, participants strengthen their critical thinking, problem-solving abilities, and understanding of cyber threats, making them better prepared for real-world cybersecurity challenges. #cybersecurity #ethicalhacking #hack #hack4bug #naqaab_bhai #naqaab50 #itcn #itcnasia #itcnasia2026 Special Thanks to @usmanisudais !
217 years unread. Around six hours of AI execution. This is a coded military message from 1809 sent to General Auguste de Marmont, one of Napoleon’s senior commanders. For more than two centuries, the surviving cipher had remained unread. Then Carter Church gave GPT-6 Astra the scanned document and a goal. There wasn’t even a completed transcription to start from. The workflow involved: → identifying roughly 1,300 cipher units from the historical scan → reconciling variations in the handwritten symbols → incorporating an existing partial historical key → writing computational tools to test the remaining cipher → comparing candidate readings against historical evidence → reconstructing the underlying French message Reported model execution time: around six hours. The decoded material turned out to be a military briefing involving Austrian troop movements shortly before the outbreak of war in 1809. There’s an important caveat: Astra did not start with absolutely zero prior cryptographic knowledge. A partial key covering some symbols already existed, and several individual readings remain uncertain. But that almost makes the interesting part clearer. This wasn’t simply an AI being asked a question and producing an answer. It had to see → transcribe → code → test → research → decode. That kind of end-to-end workflow may end up being much more significant than the cipher itself. #AI #ArtificialIntelligence #GPT6 #Cryptography #History #Napoleon #AIAgents #FutureTech
217 years unread. Around six hours of AI execution. This is a coded military message from 1809 sent to General Auguste de Marmont, one of Napoleon’s senior commanders. For more than two centuries, the surviving cipher had remained unread. Then Carter Church gave GPT-6 Astra the scanned document and a goal. There wasn’t even a completed transcription to start from. The workflow involved: → identifying roughly 1,300 cipher units from the historical scan → reconciling variations in the handwritten symbols → incorporating an existing partial historical key → writing computational tools to test the remaining cipher → comparing candidate readings against historical evidence → reconstructing the underlying French message Reported model execution time: around six hours. The decoded material turned out to be a military briefing involving Austrian troop movements shortly before the outbreak of war in 1809. There’s an important caveat: Astra did not start with absolutely zero prior cryptographic knowledge. A partial key covering some symbols already existed, and several individual readings remain uncertain. But that almost makes the interesting part clearer. This wasn’t simply an AI being asked a question and producing an answer. It had to see → transcribe → code → test → research → decode. That kind of end-to-end workflow may end up being much more significant than the cipher itself. #AI #ArtificialIntelligence #GPT6 #Cryptography #History #Napoleon #AIAgents #FutureTech
A coded military message that had gone unread for 217 years has finally been deciphered with help from GPT-6 Astra. AI engineer Carter Church used GPT-6 Astra to analyze a single low-quality reproduction of an encrypted 1809 letter addressed to French General Auguste de Marmont, one of Napoleon’s senior commanders. The document contained around 1,300 cipher units representing 155 distinct signs. The project combined image transcription, a previously published partial key, cryptanalysis, custom-written software and repeated checks against the original document. Church reports that Astra completed about six hours of model execution during the process. The decoded message describes the positions and strength of French and allied armies shortly before Austria invaded Bavaria in 1809. The work also corrected the document’s previously assigned date from 1807 to 1809. It’s a fascinating example of AI being used not just to generate content, but to help investigate historical mysteries #GPT6 #GPT6Astra #ArtificialIntelligence #AI #Napoleon #NapoleonicWars #Cipher #Cryptography #CodeBreaking #History #HistoryFacts #HistoricalMystery #AugusteDeMarmont #Technology #AIResearch #FrenchHistory #alchetron #viral Read more : https://alchetron.com/Auguste-de-Marmont
A coded military message that had gone unread for 217 years has finally been deciphered with help from GPT-6 Astra. AI engineer Carter Church used GPT-6 Astra to analyze a single low-quality reproduction of an encrypted 1809 letter addressed to French General Auguste de Marmont, one of Napoleon’s senior commanders. The document contained around 1,300 cipher units representing 155 distinct signs. The project combined image transcription, a previously published partial key, cryptanalysis, custom-written software and repeated checks against the original document. Church reports that Astra completed about six hours of model execution during the process. The decoded message describes the positions and strength of French and allied armies shortly before Austria invaded Bavaria in 1809. The work also corrected the document’s previously assigned date from 1807 to 1809. It’s a fascinating example of AI being used not just to generate content, but to help investigate historical mysteries #GPT6 #GPT6Astra #ArtificialIntelligence #AI #Napoleon #NapoleonicWars #Cipher #Cryptography #CodeBreaking #History #HistoryFacts #HistoricalMystery #AugusteDeMarmont #Technology #AIResearch #FrenchHistory #alchetron #viral Read more : https://alchetron.com/Auguste-de-Marmont
Scientists have long made predictions about Q-Day, the supposed date when quantum computers will be able to break the sophisticated cryptography systems on which modern societies rely.⁠ ⁠ John Reed explains why organisations believe it may be drawing near.⁠ ⁠ Tap the link in our bio to read more.
Scientists have long made predictions about Q-Day, the supposed date when quantum computers will be able to break the sophisticated cryptography systems on which modern societies rely.⁠ ⁠ John Reed explains why organisations believe it may be drawing near.⁠ ⁠ Tap the link in our bio to read more.
Al-Kindi lived in the Abbasid world of the 9th century and worked across philosophy, mathematics and the sciences. One of his most remarkable surviving contributions is a treatise on cryptanalysis that describes what we now call frequency analysis. The basic insight is simple: A coded message may hide its letters — but a language can still leave statistical patterns behind. Al-Kindi's work was not modern encryption, and he did not create the systems that protect today's phones or websites. Those came through centuries of later mathematics, engineering and computing. But his work represents an important early chapter in humanity's long struggle to hide information — and uncover it. #AlKindi #Cryptanalysis #Cryptography #IslamicHistory #HistoryOfScience
Al-Kindi lived in the Abbasid world of the 9th century and worked across philosophy, mathematics and the sciences. One of his most remarkable surviving contributions is a treatise on cryptanalysis that describes what we now call frequency analysis. The basic insight is simple: A coded message may hide its letters — but a language can still leave statistical patterns behind. Al-Kindi's work was not modern encryption, and he did not create the systems that protect today's phones or websites. Those came through centuries of later mathematics, engineering and computing. But his work represents an important early chapter in humanity's long struggle to hide information — and uncover it. #AlKindi #Cryptanalysis #Cryptography #IslamicHistory #HistoryOfScience
The Ultimate Cybersecurity Learning Hub #cybersecurity #hacking #cryptography #networking #infosec
The Ultimate Cybersecurity Learning Hub #cybersecurity #hacking #cryptography #networking #infosec
Cryptography secures nearly every bit of our daily digital interactions, from messaging to banking and cryptocurrencies. Yet rapid advances in quantum computing could threaten existing encryption, while the growing use of blockchain raises new questions about privacy, the risks of illicit finance, government oversight, and the future of digital trust. Read the Cryptography chapter of the 2026 Stanford Emerging Technology Review at the @HooverInstitution link in bio.
Cryptography secures nearly every bit of our daily digital interactions, from messaging to banking and cryptocurrencies. Yet rapid advances in quantum computing could threaten existing encryption, while the growing use of blockchain raises new questions about privacy, the risks of illicit finance, government oversight, and the future of digital trust. Read the Cryptography chapter of the 2026 Stanford Emerging Technology Review at the @HooverInstitution link in bio.
Here are the Skills you need to become Ethical Hacker a) Networking skills b) Computer skills c) Linux skills d) Programming skills e) SQL skills f) Hardware knowledge g) Knowledge in reverse engineering h) Cryptography knowledge i) Database skills j) Problem solving skills #CyberSecurity #ethicalhacking #hack #ishowcybersecurity #linux
Here are the Skills you need to become Ethical Hacker a) Networking skills b) Computer skills c) Linux skills d) Programming skills e) SQL skills f) Hardware knowledge g) Knowledge in reverse engineering h) Cryptography knowledge i) Database skills j) Problem solving skills #CyberSecurity #ethicalhacking #hack #ishowcybersecurity #linux
It's the beauty of pure math that a problem about factoring integers became a method for securing the information. One of the cleverest ideas in number theory became the basis of public-key cryptography: Take two large primes, p and q, and multiply them: n = pq. Multiplication is easy. But if only n is known, recovering p and q can be extremely difficult when the primes are large. That asymmetry is the mathematical heart of RSA: the public information can be shared openly, while the prime factors remain secret and are used to recover the private key.
It's the beauty of pure math that a problem about factoring integers became a method for securing the information. One of the cleverest ideas in number theory became the basis of public-key cryptography: Take two large primes, p and q, and multiply them: n = pq. Multiplication is easy. But if only n is known, recovering p and q can be extremely difficult when the primes are large. That asymmetry is the mathematical heart of RSA: the public information can be shared openly, while the prime factors remain secret and are used to recover the private key.
Capture a military radio and you’ve stolen an unclassified object. Without keys loaded, the hardware isn’t the secret — and the keys are already gone. Because there’s no master key. There’s a hierarchy. The radio holds a Traffic Encryption Key — it encrypts that squad’s voice, for one crypto period, and nothing else. Above it sits a Key Encryption Key whose only job is wrapping other keys for delivery. It never touches a message. And you cannot work backwards from one to the other. Above that, four tiers of distribution — and a squad radio never receives keys directly from the top two. It’s four steps removed from where keys are born. So the hole gets closed over the air. New key, wrapped in the old key, sent by radio. Minutes instead of the fifty hours it’d take to drive to every unit. One squad loses a radio. The army loses one crypto period, in one net. Explained in 3D. If losing a device is assumed, is that a failure or a design spec?#cybersecurity #cryptography #keymanagement #infosec #comsec
Capture a military radio and you’ve stolen an unclassified object. Without keys loaded, the hardware isn’t the secret — and the keys are already gone. Because there’s no master key. There’s a hierarchy. The radio holds a Traffic Encryption Key — it encrypts that squad’s voice, for one crypto period, and nothing else. Above it sits a Key Encryption Key whose only job is wrapping other keys for delivery. It never touches a message. And you cannot work backwards from one to the other. Above that, four tiers of distribution — and a squad radio never receives keys directly from the top two. It’s four steps removed from where keys are born. So the hole gets closed over the air. New key, wrapped in the old key, sent by radio. Minutes instead of the fifty hours it’d take to drive to every unit. One squad loses a radio. The army loses one crypto period, in one net. Explained in 3D. If losing a device is assumed, is that a failure or a design spec?#cybersecurity #cryptography #keymanagement #infosec #comsec
back to up